Liquid–Liquid Phase Separation in Nuclear Bodies

HSEF Γ · Moderate · adversarially reviewed · every claim traced to a source you can open.

In plain terms

The claim being assessed: Liquid–liquid phase separation assembles and organizes nuclear bodies in living cells, and the liquid state itself confers their compositional and functional properties.

Where the evidence stands: Γ — Plausible mechanism. There is a believable biological story and partial support, but the causal step has not been demonstrated.

What this mechanism does: This makes the process worse or keeps it going, but something else starts it.

Strongest evidence for it: Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions.

What decisive evidence would look like

In plain terms, researchers would change the proposed cause, confirm it changed as intended, and measure a meaningful health outcome while checking other explanations. The result should be able to support or count against the claim.

Experiment 1: Registered boundary experiment

Study design: In preregistered nucleolar, speckle and paraspeckle systems, use endogenous reversible sequence/charge edits that change relaxation or demixing while preserving abundance, RNA/client affinity and catalytic activity; rescue the material state with matched constructs and test physical and processing outputs separately.

What would be measured: Calibrated interfacial mixing/rheology, client composition, nascent-rRNA maturation or endogenous splicing and cell-state measures

Important controls: Expression/valency/client-affinity matched rescue, light/solvent controls, orthogonal probes of RNA/protein mobility, cell-cycle and global transcription stress

What would support the claim: Output changes track state across orthogonal edits and recover on state restoration with binding/function conserved

What would count against it: Output remains intact after verified state change, or only loss of binding/scaffold explains impairment

Relative explanatory fit: Alternative ranked ahead

What this review means

Cells organize many reactions in compartments without surrounding membranes. This review asks when liquid-like condensation creates those compartments and whether the liquid state is essential for their functions.

Implications for health and treatment: Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions.

Limits for individual care: 63 primary reports with 8 selected partial-body examinations; density, heterogeneous controls and incomplete access set the confidence, not correctness. The grade applies to the exact registered claim; stronger findings for narrower subclaims remain separate. No complete-paper audit or blinded calibration is claimed. This educational review does not establish an individual treatment recommendation.

Medical information notice: This review provides general health information, not medical advice. It cannot diagnose a condition or replace an individual discussion with a qualified clinician.

Source checking used complete abstracts/status records and selected original partial-body passages. No complete-paper audit or independent scientific peer review is claimed. Detailed access counts and limitations appear in the review.

A low grade is not an accusation. It means the causal work has not been done yet, which is the ordinary state of most actively studied mechanisms in biology.

Model comparison · reader overview

Which explanation best fits the evidence reviewed?

A separate question from the causal evidence grade

How does this explanation compare with alternatives?

Alternative ranked ahead

The reviewed hypothesis ranks 2 among 5 models compared; 1 alternative model(s) hold first rank for this stated claim.

Claim under review: rank 2 among 5 compared models.

Leading explanation: Pluralist soft-matter mechanisms.

Position in this comparison: Next after leading rank.

The causal grade asks how well the stated causal claim is established. This comparison asks which of the assessed explanations fits the reviewed findings better. A leading explanation can remain unproven. Models can overlap or include the tested mechanism; an alternative ahead does not make that mechanism irrelevant. These ordinal ranks apply within this review; they do not measure the size of a difference or rank scientific strength across topics.

Rank #1 · Leads this comparison

Pluralist soft-matter mechanisms

Demixing, percolation, polymer scaffolding, RNA maturation and active production cooperate differently by body/constituent.

Rank #2 · Claim being assessed

Macroscopic LLPS

Common demixing and liquid material state organize all named nuclear-body classes.

How the review distinguishes these models: Descriptive comparison; does not modify the nominal score. Compare locked, body-specific predictions with a reversible endogenous material-state edit that preserves client binding, enzyme abundance and RNA output, paired with direct rheology/interfacial measures and functional rescue.

Evidence that could separate the leading models: Compare locked, body-specific predictions with a reversible endogenous material-state edit that preserves client binding, enzyme abundance and RNA output, paired with direct rheology/interfacial measures and functional rescue.

Review summary

Claim assessed: Liquid–liquid phase separation assembles and organizes nuclear bodies in living cells, and the liquid state itself confers their compositional and functional properties.

Finding: Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions.

Key points

  • SC1: Macroscopic liquid–liquid demixing occurs in nuclear bodies at endogenous concentrations. — HSEF Ε, Moderate confidence.
  • SC2: The liquid state, beyond multivalent assembly, organizes nuclear-body composition and function. — HSEF Δ, Moderate confidence.
  • SC3: LLPS is the common organizing physics across nuclear-body classes. — HSEF Γ, Moderate confidence.

Verdict and review details

Evidence grade
HSEF Γ — Mechanistically plausible, partial system support
Confidence
Moderate
Framework
HSEF v5.3
Review date
Literature cutoff
Published
Review attribution (recorded)
Codex

Evidence scope: 63 primary reports; literature cutoff 2026-10-08; source examination UTC date 2026-10-08; bounded critical review, not exhaustive systematic review.

The grade applies to the stated claim. Model rankings and individual subclaim grades remain separate from the overall causal-evidence grade.

Full scientific assessment and references · Scorecard (JSON) · Review source (Markdown)

At a glance

HSEF levelΓ — Mechanistically plausible, partial system support
ConfidenceModerate
Role of mechanismreinforcing / stabilizing factor
Calibration role of this reviewNot a calibration entry; the separate five-case Gemini/Abacus review and PKU calibration record are documented in the framework record
Schema5.3
Posted2026-10-09

Sub-claims assessed separately

IDSub-claimTypeLevelPivotal card
SC1Macroscopic liquid–liquid demixing occurs in nuclear bodies at endogenous concentrations.existenceΕ—
SC2The liquid state, beyond multivalent assembly, organizes nuclear-body composition and function.mechanismΔ—
SC3LLPS is the common organizing physics across nuclear-body classes.generalizationΓ—

Figures

Explanatory figures summarizing this review. They carry no evidential weight of their own; where a figure and the review differ, the review governs.

Phase-separation proteins, atom by atom
Figure 1. Phase-separation proteins, atom by atom Read each panel's caption for its image type, source and experimental or anatomical setting. Note: The plate illustrates the topic; its inclusion does not change the review's evidence rating.

Image sources, licenses and attribution

Read the labels in this plate
Phase-separation proteins, atom by atom
Nuclear-body proteins rendered from public-domain structural coordinates
Real data panels
PDB render
NPM1 (nucleophosmin), side view
Pentameric core protein of the nucleolus; its self-assembly underlies nucleolar organization.
PDB 2P1B · public-domain coordinates, rendered for this graphic
PDB render
hnRNP A2 low-complexity domain, fibril
A prion-like domain that phase-separates; solved here in its ordered fibril state.
PDB 5W3N · public-domain coordinates, rendered for this graphic
PDB render
NPM1, top view
The fivefold ring: one protein building a repeating scaffold.
PDB 2P1B · public-domain coordinates, rendered for this graphic
Structures are real data; the droplet account is one of several compared in this review.
Conceptual illustration
Nuclear bodies inside human cells
Figure 2. Nuclear bodies inside human cells Read each panel's caption for its image type, source and experimental or anatomical setting. Note: The plate illustrates the topic; its inclusion does not change the review's evidence rating.

Image sources, licenses and attribution

Read the labels in this plate
Nuclear bodies inside human cells
Real immunofluorescence — distinct nuclear-body staining patterns
Real data panels
Real image
Nuclear-body patterns in human cells
Speckled, homogeneous, nucleolar and other antinuclear patterns each mark different nuclear structures.
Al-Mughales JA (2022) · Wikimedia Commons · CC BY 4.0
Schematic
Two accounts at this scale
A · Droplets alone explain how nuclear structures form and work.
B · Droplets, networks, RNA and ongoing production act together — better fit in this review.
Staining patterns are real; several physical mechanisms can act together in these structures.
Conceptual illustration

Full assessment

From here the review is written for a technical reader: caps and thresholds, competing models, the independence basis, and the citation ledger.

Sources: 63 primary reports; claims: 67; verified: 67; unverified: 0. Verification is bounded attribution. Access: 8 partial-body and 55 complete abstract/status examinations. Literature cutoff: 2026-10-08; source examination UTC date: 2026-10-08. No complete-paper audit or blinded calibration claimed.

Adversarial review: Generated by Sol 6.1; adversarially reviewed by Claude Opus 5.5 (Anthropic) on 2026-10-14. 5 corrections applied (see ADVERSARIAL REVIEW AND APPROVAL). Status: Approved as revised.

AT A GLANCE

Endogenous nuclear condensation and selected material-state effects are supported, but common macroscopic LLPS and simple-liquid necessity across nuclear bodies are not established.

Level Confidence Causal role Momentum Stability Divergence
Γ — Mechanistically plausible, partial system support Moderate reinforcing / stabilizing factor Mechanistic only Stable Contested

Deciding experiment: In preregistered nucleolar, speckle and paraspeckle systems, use endogenous reversible sequence/charge edits that change relaxation or demixing while preserving abundance, RNA/client affinity and catalytic activity; rescue the material state with matched constructs and test physical and processing outputs separately.

Belief versus evidence: Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions.

Best-supported rival: Pluralist soft-matter mechanisms. Compare locked, body-specific predictions with a reversible endogenous material-state edit that preserves client binding, enzyme abundance and RNA output, paired with direct rheology/interfacial measures and functional rescue.

COMPETING MECHANISTIC MODELS

Rank 1: Pluralist soft-matter mechanisms (Ε). Demixing, percolation, polymer scaffolding, RNA maturation and active production cooperate differently by body/constituent. Endogenous micelle deletions, endogenous opto-gel processing, RNA transport and near-native aspiration: PMID33885174,31399547,37683610,40434645. Pluralism is broad rather than one complete predictive model; independent state-only functional rescues remain sparse.

Rank 2: Macroscopic LLPS (Γ). Common demixing and liquid material state organize all named nuclear-body classes. Native nucleolar physical data, worm phase predictions, composition/partition and speckle/PML contrasts: PMID27212236,26351690,32405004,38381607,37219517. Paraspeckle micelles, functional partially solid compartments and nondiagnostic phenomenology prevent universal inference.

Rank 3: RNA block-copolymer micelles (Ε). NEAT1 architecture constrains paraspeckle geometry through microphase separation. Expression-matched end deletions plus size/shape/transcription predictions: PMID33885174; assembly/tether framework PMID29932899. Shared HAP1/investigator platform; restricted paraspeckle geometry does not explain other bodies or all functions.

Rank 4: Dynamic gel/polymer scaffolds (Ε). RNA/protein networks can support rapid small-protein diffusion while constraining large substrates. Native RNA dynamics, RNase/aspiration and opto-gel mesh contrast: PMID37683610,40434645,31399547. Timescale/probe-dependent and mixed with liquid phases; static scaffold is not a universal body explanation.

Rank 5: Polymer bridging or clustered binding (Δ). DNA/RNA scaffolds can concentrate proteins without autonomous bulk demixing. Cohesin DNA-length dependence, HSV PolII binding and half-FRAP benchmarks: PMID33568486,31038454,36526633. Comparator systems do not establish that every canonical body forms by BIPS; stronger direct native-body tests required.

The tournament does not alter the nominal level. Compatible pathways and flexible alternatives are not automatically proved by explaining observations.

FULL REVIEW

Registered claim and scope

Liquid–liquid phase separation assembles and organizes nuclear bodies in living cells, and the liquid state itself confers their compositional and functional properties.

Use the dedicated nuclear-body index entry, distinct from transcriptional condensates and pathological RBP solidification. Register weakest-link across the broad claim while reporting body-class-specific causal results; generalized failure does not downgrade a separately scoped success.

Selection: public-interest rank 34 from the editorial ranking compiled 2026-09-23; categorical prior verdicts were visible. Private fresh review; earlier documents are preserved.

Evidence and causal interpretation

The claim combines three burdens: endogenous demixing, causal material-state contribution and common physics across classes. Native nucleolar physical data support demixing far beyond rounded puncta. Frog fusion/surface tension, worm concentration/kinetic tests and human composition-dependent partitioning are mutually informative (PMID27212236,21368180,26351690,32405004). A fixed single-component saturation concentration is not required in a multicomponent system.

The strongest functional boundary is Zhu 2019 (PMID31399547). Physical assays use expressed opto-constructs and frog oocytes, but the pre-rRNA assay uses NPM1-Cry2olig tagged at its endogenous locus. After 24–72 h light exposure, controls show general transcript reduction; normalized tagged cells specifically accumulate 46S/45S and reduce downstream intermediates. Large complexes are hindered while small-protein mobility persists. This crosses contribution, yet it is selective processing impairment, not cessation of all function, and the examined body does not establish a light-off functional rescue.

Liquid-like proteins do not mean every constituent behaves as a simple liquid. Original 2023 pulse-chase and RNA half-FRAP show slow outward RNA transport and large RNA/NPM1 diffusivity differences, consistent with an entangled mesh (PMID37683610). Models acknowledge diffraction, chase kinetics and maturation mixtures. Near-native 2025 aspiration finds a more fluid GC and partly solid DFC/FC, which fluidizes after RNA degradation (PMID40434645). These strengthen a mixed, timescale-dependent physical picture rather than falsifying all demixing.

Paraspeckles are an experimentally discriminating alternative. NEAT1 domain deletion/NONO tether rescue establishes multivalent architecture (PMID29932899). Expression-matched terminal deletions remove ordered shells, enlarge bodies and make double-deleted structures round; WT versus mutant transcription responses match block-micelle predictions (PMID33885174). This is microphase separation. It should not be described as absence of condensation, nor silently renamed common macroscopic LLPS.

Speckle function is more securely established than liquid-state exclusivity. SON/SRRM2 co-depletion disperses multiple markers, whereas loss of the SC35 epitope alone can leave other speckle markers intact (PMID33095160). Native knock-in/depletion and RNA recruitment affect splicing (PMID35929045,38720076). 2024 synthetic oligomer replacements and 2025 charge-block effects distinguish assembly from relaxation (PMID38381607,40233760), but unavailable original rescue details limit a broad state-only functional conclusion.

FBL AML experiments are a serious positive case, with an in vivo screen, depletion/rescue and RNA/growth readouts (PMID38745030). Public original extended-data captions confirm that a phase-competent hnRNPA1 PLD replacement fails to rescue, while some catalytic/acetylation mutants retain similar FRAP. Therefore phase competence alone is insufficient; molecular interaction grammar matters. Main Methods/Results and supplements were unavailable and are not represented as fully examined.

Cajal and PML bodies add distinct architecture. Coilin loss in zebrafish causes snRNP deficits and arrest, bypassed by mature snRNP supply (PMID20357773); this establishes useful assembly without uniquely requiring a liquid state. PML SUMO/addback architecture and patient-variant dynamics/recruitment are positive mechanistic studies (PMID17081985,37219517), but preserved overall oligomerization plus FRAP is not full control of all partner interactions.

Methods controls directly test inference failures. Classic FRAP/hexanediol cannot separate controlled LLPS from clustered binding, while calibrated half-FRAP tests an interfacial barrier (PMID36526633). Hexanediol inhibits low-concentration structured kinases and IDR-deleted P-TEFb, with dilution restoring activity; reversibility is therefore not specificity (PMID33814344). Chromatin and yeast transcription comparisons reinforce this warning (PMID33536240,35963432). These controls do not erase orthogonal physical evidence.

The broad weakest-link score is Γ, with scoped endogenous demixing Ε and specific material-property contribution Δ. The strongest rival is pluralist soft matter: phase separation, percolation, RNA architecture, substrate maturation and activity can cooperate. A state-specific rescue across preregistered classes would most directly resolve the remaining generalization burden.

HYPOTHESIS STATE EVALUATION FRAMEWORK (HSEF v5.3)

Subclaim matrix and aggregation

Subclaim Scope Level Decision
SC1 Macroscopic liquid–liquid demixing occurs in nuclear bodies at endogenous concentrations. nucleoli, speckles, paraspeckles and other named body classes Ε Ε: endogenous nucleolar demixing and composition-dependent physical organization have context-specific causal support, with native concentration/phase controls. This scoped existence success does not extend identically to all classes or constituents.
SC2 The liquid state, beyond multivalent assembly, organizes nuclear-body composition and function. state-specific endogenous body perturbations Δ Δ: endogenous NPM1 opto-gelation alters specific pre-rRNA processing relative to light controls; emerging charge/domain tests add support. Liquidity-only matched functional rescue and broader body classes remain unresolved, preventing a general necessity inference.
SC3 LLPS is the common organizing physics across nuclear-body classes. body classes and conditions specified before outcomes Γ Γ: class-general LLPS remains a mechanistic model, constrained by endogenous paraspeckle micelle tests, RNA-gel/partly solid nucleolar measurements and scaffold/binding alternatives. Restricted successes cannot establish common physics.

Preregistered aggregation: weakest-link. Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions. Sensitivities: weakest-link Γ; primary-subclaim Δ; scope-matched Δ.

Decisive-perturbation inventory and causal tally

[1] Nucleolar GC/DFC have distinct fusion dynamics, low surface tension and reconstituted immiscible phases; concentration/domain manipulations alter organization. Injection and domain changes affect binding/valency; FIB1 deletion can localize by native co-recruitment. Assembly physics does not alone prove function requires liquid state.

[2] HMGB1 frameshifts replace an acidic tail with basic residues, cause nucleolar mispartitioning and alter rRNA biogenesis; 12/13 tested variants enhance partitioning. Charge, interaction targets and location change together; not liquidity-only loss/rescue across body classes.

[3] CasDrop optogenetic condensates exclude/pull chromatin and prefer softer genomic regions. Engineered IDR/optogenetic assembly, not unmodified endogenous nuclear bodies; linked erratum PMID30849377 details unexamined.

[4] Dense/dilute concentration and transfer-energy measurements show heterotypic composition-dependent partitioning; fixed single-component saturation is absent, with RNA/transcription and valency contrasts. Increased expression and ActD influence substrate supply; multicomponent nonfixed saturation is not disproof of LLPS, while partitioning is not liquid-state functional rescue.

[5] Charge patterns and RNA binding organize subphases and nucleolar pH gradients. Binding/coacervation/composition vary together; a pH difference does not uniquely identify liquidity-dependent biological output.

[6] FBL domain rescues link condensation-competent architecture to growth and rRNA processing; public extended-data captions report failed hnRNPA1-PLD substitution and retained FRAP for catalytic mutants. Main body/supplements not accessible; only original extended-data captions examined. Phase competence alone is insufficient in the failed PLD rescue, and drug/charge/binding specificity remains.

[7] FBL phenylalanine substitutions impair liquid/hydrogel assembly, DFC location and partner interactions. Both hydrogel and liquid states fail alongside binding; expressed mutant is not endogenous liquidity-only rescue.

[8] Misfolded proteins enter nucleolar GC, with Hsp70-dependent recovery and prolonged-stress solidification/quality-control failure. Stress, chaperone function and damage vary together; no isolated material-state requirement at normal homeostasis.

[9] FBL RNA binding/GAR self-association organizes nascent pre-rRNA traffic and DFC clusters. RNA binding, self-association and localization are coupled; functional condensate contribution does not show simple-liquid exclusivity.

[10] Scaffold/surfactant-client simulations yield size-conserved multiple droplets or coarsening depending on ratio. Computational existence of size arrest is not endogenous body demonstration; lack of coalescence alone cannot rule out liquids.

[11] Native nucleoli undergo fusion, deformation and ATP-sensitive viscous relaxation with coalescence-linked size distributions. Large amphibian oocytes are a restricted physical context; dynamic fluidity is not alone functional-state necessity.

[12] Hi-C-parameterized genome simulations predict nucleolar nucleation/arrest and a metastable two-droplet state. Model agreement with physical measures does not prove all nuclear bodies demix; chromatin arrest can mimic non-coarsening phenotypes.

[13] NEAT1 end deletions at comparable expression remove core-shell order, enlarge and round paraspeckles; WT versus mutant transcription responses fit micelle predictions. Restricted HAP1/mutant model; micellization is microphase separation, not absence of all phase behavior. RNA-domain changes can alter interactions, and global function not tested.

[14] CRISPR NEAT1-domain deletion and NONO dimer-domain-dependent tether rescue establish multivalent assembly; selected fragments form in vitro aggregates. RNA-protein enrichment/assembly rescue, with hexanediol sensitivity, does not distinguish a liquid state from micelle/polymer-scaffold organization.

[15] Paraspeckles have ordered radial core-shell NEAT1/protein organization; FUS loss fragments them. Radial morphology and loss of scaffold cohesion do not alone distinguish all physical models or establish material-state function.

[16] Needle shearing/heating improves NEAT1 recovery about 20-fold; FUS prion-like interactions affect semi-extractability. Extraction tenacity and estimated transcript numbers do not measure liquid versus gel state in living cells.

[17] NEAT1 promoter activation in two lines increases intact core-shell paraspeckles. Endogenous locus activation changes abundance; it does not isolate liquid-state functional necessity.

[18] Integrator cleavage changes NEAT1 isoforms and restrains paraspeckle assembly. Broad RNA-processing mediator; no liquid-state-specific intervention or complete functional rescue.

[19] SRRM2/SON form immiscible subcompartments; oligomerizable synthetic modules replace RS assembly roles while serines tune liquidity and target splicing. Original abstract only in this packet. Synthetic oligomer rescue of assembly is not automatically matched liquid-state functional rescue; distinct splicing factors have nonredundant direct functions.

[20] C9 repeat RNA/DPRs alter speckle dynamics and sequester SRRM2; integrity loss changes splicing and neuronal viability. Disease toxicity and factor sequestration alter binding/abundance globally; cannot isolate liquid-state-only causation.

[21] SON/SRRM2 co-loss disperses multiple speckle markers without comparable Cajal loss; original shows SC35 chiefly recognizes SRRM2 and truncation alone can remove SC35 staining without dissolving speckles. Protein loss and antibody epitope loss must be separated from body loss; scaffold requirement is not proof that liquidity itself is essential.

[22] SRRM2 charge blocks alter network relaxation without markedly shifting condensation threshold; CK2 phosphorylation is linked to splicing after DNA damage. Abstract-only quantitative/rescue details; CK2 has many substrates and charge edits alter interactions. Supports a stronger state-function test but not broad common-liquid generality.

[24] HIF2alpha speckle-targeting motifs influence selected ccRCC transcriptional programs; speckle states correlate with outcomes. Motif-mediated spatial targeting and tissue state do not isolate liquidity, and prognostic association is not therapeutic primacy.

[25] Malat1 knockout mice retain speckle markers and normal baseline viability/fertility, with context-specific NEAT1 changes. Baseline absence phenotype does not exclude stress-specific function or all alternative RNA contributions; scaffold redundancy matters.

[26] Controlled LLPS and clustered-binding systems show classic FRAP/hexanediol are nondiagnostic; calibrated half-FRAP probes preferential internal mixing. Interfacial barriers vary by body and probe; benchmark specificity is not itself full-body functional proof.

[27] Both 1,6-HD and nominal-control 2,5-HD suppress coalescing/noncoalescing gene transcription and increase nucleosome density. Dose/temperature/organism-specific off-target effect; does not invalidate all orthogonal LLPS studies.

[28] Hexanediol dose-dependently immobilizes/hypercondenses chromatin; 5 percent or more freezes tested chromatin motion. A distinct chromatin effect, not universal evidence against condensates; lower concentrations still require assay-specific validation.

[29] PolII clusters form near CB/HLB; coilin knockout changes associations without PC number/timing changes, and PC removal leaves CB/HLB. Hexanediol-based liquidity ranking is not definitive; demonstrates separable assembly dependencies, not proof that CBs never phase separate.

[30] 1.5 percent short treatment dissolves bodies with different chromatin-contact effects than longer exposure/aggregation. Retained viability does not rule out kinase/transcription off-targets; neither dose nor 2,5-HD is universally specific.

[31] Structured low-concentration kinases and IDR-deleted P-TEFb are inhibited by hexanediol; dilution restores activity and kinase inhibition can preserve CTD droplets. Tested enzymes/protocol, not direct cellular degree estimate. Reversibility does not make solvent effects LLPS-specific.

[32] SLERT favors closed DDX21 conformation and loose clusters linked to FC/DFC fluidity and PolI processivity. Helicase conformation, multimerization and RNA binding are inseparable in these selected abstract claims; no body-general liquid-state inference.

[33] Slow directional RNA motion and approximately 5000-fold RNA/NPM1 diffusivity differences support entangled RNA with rapid protein movement through its mesh. RNA labeling, washout, noise floor and maturation mixtures limit inferred transport parameters. Maxwell-fit/gel interpretation is model-supported, not proof every constituent is solid.

[34] DDX18 loss disrupts nucleolar/chromatin organization; NoCasDrop targeted condensation restores selected centromere/heterochromatin readouts. Synthetic rescue of structure, not necessarily pluripotency or material-state-only rescue; helicase/RNA binding and transcription confounds.

[35] MALAT1 modulates SRSF1/pre-mRNA interactions and condensation near speckles with hypoxia-responsive splicing. PubMed journal issue is dated 19 March 2026, before the cutoff; earlier preprint is the same work. Interaction/recruitment specificity versus liquid state remains, original body not examined.

[36] RNA amount promotes then dissolves transcriptional condensates, consistent with nonequilibrium feedback. Transcriptional cluster comparator, not the canonical body classes' universal assembly or liquidity function.

[37] Physiological dynamic LCD hubs stabilize binding and recruit PolII without detectable macroscopic phase separation. Local hubs at tested loci do not rule out other bodies or nanoscopic condensation; a distinct comparator rather than nucleolar null.

[38] CTD phosphorylation shifts partition preference from mediator to splicing-factor condensates. Phosphorylation also regulates conventional binding/enzymatic activity; not unique evidence of an endogenous required liquid phase.

[39] rRNA transcription seeds precisely timed nucleoli; without rDNA, variable high-concentration assemblies still arise. Seeding and phase behavior can cooperate; activity-defined formation does not alone isolate physical state required for function.

[40] Alu RNA depletion disrupts nucleolar structure/rRNA transcription, while added RNA increases size and pre-rRNA. RNA scaffold and PolII/PolI cross-talk are changed together; not liquid-state-selective necessity.

[41] Fkbp39 chromatin localization/binding directs nascent 60S partition and improves ribosomal assembly. Native sorting and binding are causal in yeast, but liquidity-only separation and broad body generality are untested here.

[42] Sequential processing maps spatial maturation; engineered SSU defects invert layers and prevent outflux, while LSU precursors build the outer layer. Synthetic rDNA plus processing perturbation changes substrate architecture itself; supports RNA-programmed structure rather than universal simple-liquid necessity.

[43] RD-SPRITE identifies RNA territories; selected RNAs recruit regulators and alter contacts/function. Spatial enrichment and binding-guided assembly do not uniquely identify demixing versus scaffold-driven territories.

[44] Coilin loss disperses CB, impairs snRNP production and arrests development; mature human snRNPs restore mRNA/viability while RNA alone does not. Product bypass shows CB-associated assembly is useful yet not an irreplaceable liquid prerequisite; depletion is not a material-state edit.

[45] CB RNAi disassembly changes gene clustering/expression and increases splicing noise. Coilin/assembly loss and snRNP supply explain effects without requiring phase-state-specific causation.

[46] PML addback restores bodies, and SUMO-binding/RING mutants alter nucleation/recruitment. SUMO architecture versus liquid state not separated; linked erratum PMID29654784 metadata checked but details unavailable.

[47] A216V/L268P compare dynamics, packing, recruitment/PTMs and stress/senescence outputs with retained overall RBCC oligomerization. Important positive variant comparison, but FRAP is not alone LLPS proof and altered binding/packing may change output; original body unavailable.

[48] NPM1 conformation changes valency and switches competing homo/heterotypic LLPS mechanisms. Biophysical reconstitution is not endogenous liquid-state-selective function or cross-class necessity.

[49] Multivalent acidic motifs, oligomerization and RNA-binding domains drive NPM1 coassembly and nucleolar localization. Loss of interaction/localization is not selective loss of liquidity while retaining same clients/function.

[50] Crowding/concentration modulates interconversion of homo/heterotypic scaffolding networks. Proposed vectorial output is not directly established by this in vitro network alone.

[51] PolyPR binds NPM1 acidic regions, dissolves in vitro droplets and disperses cell NPM1 while trapping RNA statically. Broad pathogenic interactions, not an isolated physiological liquid-state perturbation/rescue.

[52] Liquid-like cohesin-DNA clusters depend on DNA length above 3 kb, supporting bridging-induced condensation. DNA polymer comparator, not direct paraspeckle/Cajal mechanism; fusion/FRAP do not uniquely identify protein LLPS.

[53] HSV replication compartments concentrate PolII through accessible DNA/rebinding despite unrestricted interfacial diffusion. Viral compartment context, not native nucleolar null; provides a mechanism that reproduces misleading puncta phenomenology.

[54] Speckle proximity predicts more spliceosome binding, and directed pre-mRNA recruitment increases splicing. Spatial concentration is functionally sufficient in the tested assay, but does not identify liquidity as the causal feature; preprint is not separate replication.

[55] EGFP-SRRM2 knock-in dynamics and depletion link scaffold to selected exon splicing, viability and differentiation. SRRM2 is itself a spliceosome protein; generic factor loss is not liquid-state-only necessity, and sphere/FRAP criteria are incomplete.

[56] SRRM2 depletion disperses speckles and changes active-compartment interactions and 1282 genes; contact changes do not track expression changes. Broad scaffold/splicing loss and uncoupled contacts constrain unique material-state interpretation.

[57] Multiple structural or functional CB components nucleate apparently functional bodies when immobilized on chromatin. Nonhierarchical self-organization does not prove LLPS; tethered high local concentration is engineered.

[58] Nascent NEAT1 transcription recruits functional paraspeckle proteins and retains mRNAs; continued transcription supports maintenance. RNA platform and activity-dependence do not specify a bulk liquid or forbid microphase separation.

[59] Endogenous-locus NPM1-Cry2olig cells accumulate 46S/45S and lose downstream precursors relative to light controls; activated mesh hinders large complexes while small-protein mobility persists. Processing assay uses 24–72 h light with general toxicity normalized; concentration/percolation and new interactions vary. Selected body shows no matched light-off functional rescue, and processing is selectively impaired rather than globally absent.

[60] Micropipette aspiration shows liquid-like GC but partly solid-like DFC/FC; RNase fluidizes internal phases and changes tension. Restricted oocyte/aspiration context; RNA destruction changes substrate and interactions along with rheology, not selective functional rescue.

[61] Chromatin depletion/flow accompanies coalescing nucleoli; short-range attraction models anomalous volume distribution. Model-supported attraction and coarsening, not biological-function necessity or universally equilibrated liquid droplets.

[62] Cell-size/concentration perturbation and nucleolar/extranucleolar kinetics agree with phase-transition predictions modulated by rRNA transcription. Embryonic worm regime and active seeding; doesn't show every nuclear body shares the same physics.

[63] Changing scaffold ratio/valency switches client composition in reconstitutions/cells, with analogous PML/P-body partitioning. Analogous natural partitioning is not identical physical proof, and synthetic-liquid compositional control is not body-general liquid necessity.

Tally: 62 discriminating contrasts. Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines. Shared cohorts, experimental platforms, transgenic lineages and repeated outcomes do not constitute fully independent causal lines.

Cap audit, precedence and Β/Γ/Δ boundary

Nucleolar physical demixing earns context-scoped Ε; endogenous NPM1 tagging with light controls and size-selective mesh/processing readouts crosses Δ contribution. It is not withheld merely because no RCT exists. Lack of full reversible functional rescue and classes with alternative physics constrain broader claims; Γ applies to common-physics generalization, not re-capping the assembled native nucleolar evidence.

Gamma hard-rule audit: FRAP exchange, rounded puncta and solvent sensitivity alone cannot establish LLPS or liquid-state-specific function. Protein/RNA depletion, localization and binding changes must be distinguished from a state-only intervention; synthetic assembly does not by itself generalize to endogenous bodies.

SC3 cap: “Mechanistic plausibility plus in vitro reconstitution or simplified cellular support caps at Γ.” Γ: class-general LLPS remains a mechanistic model, constrained by endogenous paraspeckle micelle tests, RNA-gel/partly solid nucleolar measurements and scaffold/binding alternatives. Restricted successes cannot establish common physics.

SC1 field-valid definition: “ - Endogenous degron of a condensate component with matched rescue, AND evidence that the specific condensate state (not generic protein loss) drives the phenotype - Locus-specific disruption of looping with locus-specific effect - Combinatorial histone-mark perturbation showing direct output dependence - Critically: specificity against cell-cycle collapse, global transcriptional collapse, and replication stress must be demonstrated” Positive full-scope result: yes. Ε: endogenous nucleolar demixing and composition-dependent physical organization have context-specific causal support, with native concentration/phase controls. This scoped existence success does not extend identically to all classes or constituents.

SC2 field-valid definition: “ - Endogenous degron of a condensate component with matched rescue, AND evidence that the specific condensate state (not generic protein loss) drives the phenotype - Locus-specific disruption of looping with locus-specific effect - Combinatorial histone-mark perturbation showing direct output dependence - Critically: specificity against cell-cycle collapse, global transcriptional collapse, and replication stress must be demonstrated” Positive full-scope result: yes. Δ: endogenous NPM1 opto-gelation alters specific pre-rRNA processing relative to light controls; emerging charge/domain tests add support. Liquidity-only matched functional rescue and broader body classes remain unresolved, preventing a general necessity inference.

SC3 field-valid definition: “ - Endogenous degron of a condensate component with matched rescue, AND evidence that the specific condensate state (not generic protein loss) drives the phenotype - Locus-specific disruption of looping with locus-specific effect - Combinatorial histone-mark perturbation showing direct output dependence - Critically: specificity against cell-cycle collapse, global transcriptional collapse, and replication stress must be demonstrated” Positive full-scope result: no. Γ: class-general LLPS remains a mechanistic model, constrained by endogenous paraspeckle micelle tests, RNA-gel/partly solid nucleolar measurements and scaffold/binding alternatives. Restricted successes cannot establish common physics.

Upward threshold ladder

SC1 Δ: “Requires at least one endogenous perturbation showing the proposed feature contributes causally to the claimed output.” Satisfied: yes.

SC1 Ε: “Requires context-specific causality with clear scope restriction. Many enhancer, condensate, or accessibility claims belong here.” Satisfied: yes.

SC1 Ζ: “Requires: - Independent causal tests across loci or systems - Specificity beyond global transcriptional collapse - Narrowing of key alternatives” Satisfied: no. A prespecified causal test matching this subclaim, with mechanistic engagement, meaningful phenotype change and an appropriate negative control.

SC2 Δ: “Requires at least one endogenous perturbation showing the proposed feature contributes causally to the claimed output.” Satisfied: yes.

SC2 Ε: “Requires context-specific causality with clear scope restriction. Many enhancer, condensate, or accessibility claims belong here.” Satisfied: no. A prespecified causal test matching this subclaim, with mechanistic engagement, meaningful phenotype change and an appropriate negative control.

SC3 Δ: “Requires at least one endogenous perturbation showing the proposed feature contributes causally to the claimed output.” Satisfied: no. A prespecified causal test matching this subclaim, with mechanistic engagement, meaningful phenotype change and an appropriate negative control.

Upper ladder: Endogenous locus edits/degrons with interaction-matched rescue, allele natural experiments and graded function/rheology tests are live high-level routes. They can reach upper levels without an RCT. Current convergent evidence supports scoped demixing and contribution, but not common liquid-only organization across all classes.

Independence: Feric, Berry, Riback and Zhu share some physical/investigator platforms; NPM1 reconstitutions and speckle SRRM2 papers reuse architectures. RNA pulse-chase, endogenous gene editing and aspiration are distinct measurements but not fully independent matched functional rescues. Counts include explicitly marked original simulation/method comparators.

Falsification and pitfalls

Alternative physical model predicts endogenous architecture after targeted edit. NEAT1 expression-matched end deletion changes ordered shells/size as micelle model predicts, PMID33885174. Additional downgrade: False.

Fast protein FRAP coexists with a slow RNA network. RNA/NPM1 diffusivity contrast and aspiration, PMID37683610,40434645. Additional downgrade: False.

FRAP or hexanediol equated with LLPS proof. Half-FRAP binding benchmark and direct enzyme inhibition.

Antibody epitope loss equated with body dissolution. SC35 staining is lost in deep SRRM2 truncation while other markers remain.

Liquid and gel treated as mutually exclusive at every timescale. RNA entanglement and small-protein diffusion coexist in nucleoli.

Condensation rescue equated with liquid-specific functional rescue. NONO tether, synthetic oligomers and FBL PLD substitution distinguish these burdens.

Provider review citation presented as original test. Consensus broad gel-rescue statement replaced by original Zhu passage.

Adversarial steelman: above, then below

Steelman Δ for the broad claim: nucleolar material perturbation, expression-matched paraspeckle architecture and speckle charge-state/function tests together show physical organization is causal. This supports the pluralist mechanism, but does not distinguish common macroscopic LLPS as the organizing physics across all registered classes.

Steelman Β: routine evidence is imaging/partition association with binding confounding. Γ remains justified by physical reconstitution, native phase measurements and causal perturbations; reducing everything to association would discard original endogenous tests.

Retain Γ for the weakest-link broad statement and explicitly preserve Ε existence and Δ selected functional contribution. Do not claim phase separation refuted or merely a metaphor.

Final score, causal direction and M/S/D

Preregistered weakest-link aggregation returns Γ from SC3 common organizing physics, despite scoped SC1 Ε and SC2 Δ. Primary SC2 and its scope-matched sensitivity return Δ; broad class-general scope remains Γ. This does not downgrade genuine nucleolar demixing or functional material-property contributions.

Canonical step 5 fits the broad registered mechanism: condensation/material organization changes assembly and throughput in selected contexts, without unique necessity across all body classes. This role does not claim primary initiation or deny a restricted scaffold requirement.

Momentum: Mechanistic only. The named work is active and genuinely mechanistic (2024 FBL domain and speckle subphase studies, 2025 charge-network, micropipette-aspiration and engineered RNA-architecture studies, 2026 hypoxia splicing), but every one of them is a completed publication and none attempts the boundary check this review identifies as decisive: a liquidity-only matched functional rescue across the preregistered body classes. The review itself asserts no currently recruiting study. Momentum modifies no letter.

Stability: Stable. No named pending result is asserted to be likely to move the registered score imminently.

Divergence: Contested; no single implied-level arithmetic. Artifact for the split: review and grant framing of phase separation as the established organizing principle of nuclear bodies implies a high rung, while the methodological literature in the same field argues that the standard diagnostics cannot distinguish controlled demixing from clustered binding at all, implying a much lower one (PMID36526633,33814344,33885174). These dimensions do not change level or confidence.

PROPOSED DECISIVE EXPERIMENTS

In preregistered nucleolar, speckle and paraspeckle systems, use endogenous reversible sequence/charge edits that change relaxation or demixing while preserving abundance, RNA/client affinity and catalytic activity; rescue the material state with matched constructs and test physical and processing outputs separately.

Readout: Calibrated interfacial mixing/rheology, client composition, nascent-rRNA maturation or endogenous splicing and cell-state measures. Controls: Expression/valency/client-affinity matched rescue, light/solvent controls, orthogonal probes of RNA/protein mobility, cell-cycle and global transcription stress. Supporting: Output changes track state across orthogonal edits and recover on state restoration with binding/function conserved. Falsifying: Output remains intact after verified state change, or only loss of binding/scaffold explains impairment.

RESEARCH TIMELINE

Year Milestone Primary source Interpretation
2006 PML SUMO/addback assembly PMID17081985 Linked correction details remain unavailable.
2008 De novo tethered Cajal body PMID18948503 Self-organization is not unique LLPS.
2010 Coilin/product bypass in zebrafish PMID20357773 Functional assembly route.
2011 Active nucleolar liquid dynamics PMID21368180 Native restricted physical context.
2011 Nascent-RNA paraspeckle assembly PMID21170033 Activity-dependent scaffold.
2012 Malat1 mouse knockout PMID22718948 Baseline speckles preserved.
2015 RNA-dependent worm nucleolar phase tests PMID26351690 Concentration and kinetics.
2016 NPM1 multivalent integration PMID26836305 Binding/location and state coupled.
2016 Coexisting nucleolar phases PMID27212236 Physical assembly evidence.
2016 Paraspeckle radial core-shell PMID27646274 Ordered RNA architecture.
2018 NEAT1 domain/tether rescue PMID29932899 Assembly not unique bulk liquid.
2019 Endogenous NPM1 optical gelation PMID31399547 Selective processing inhibition.
2019 DNA binding nuclear comparator PMID31038454 Puncta without restricted boundary.
2020 Composition-dependent thermodynamics PMID32405004 Nonfixed saturation is multicomponent.
2020 SON/SRRM2 and SC35 specificity PMID33095160 Epitope versus body-loss control.
2021 Paraspeckle micelle predictions PMID33885174 Targeted endogenous architecture.
2021 Hexanediol enzyme off-targets PMID33814344 Reversibility not specificity.
2022 Calibrated half-FRAP benchmark PMID36526633 Internal mixing discriminator.
2023 RNA entanglement/advective motion PMID37683610 Mixed RNA/protein rheology.
2023 PML patient-variant comparison PMID37219517 Important positive, FRAP limits.
2024 Speckle subcompartment replacement PMID38381607 Assembly versus relaxation.
2024 FBL functional domain rescue PMID38745030 Phase competence alone insufficient.
2025 Speckle charge-network relaxation PMID40233760 State/threshold separation.
2025 Native nucleolar aspiration PMID40434645 Partly solid inner phase.
2025 RNA-engineered nucleolar architecture PMID40604277 Processing programs layered structure.
2026 Hypoxia splicing-factor condensates PMID41861784 Interaction/state distinction remains.

KNOWLEDGE GAPS

Measure physical state at endogenous concentrations with multiple constituents and timescales, rather than assigning a whole body from one protein FRAP curve.

Preserve RNA/client affinity, valency, protein abundance and catalysis while selectively changing state; use matched functional restoration.

Add light-off processing rescue and shorter perturbation windows to separate mesh effects from 24–72 h light toxicity.

Test predicted paraspeckle micelle geometry against alternative arrested-liquid/BIPS models without redefining all microphase separation as bulk LLPS.

Separate phosphorylation effects on spliceosome binding and global CK2 activity from network relaxation.

Quantify PML variant effects on partner binding, SUMO and arsenic response independently of FRAP-inferred liquidity.

Extend state/function tests to Cajal and other classes while preserving their macromolecular-product supply.

Map active RNA maturation, entanglement and interfacial transport with calibrated identifiable models and independent replication.

Complete unavailable original bodies, supplements and linked correction details before reproducing decisive figures publicly.

METHODS AND CONSENSUS CONTRIBUTION

Consensus was used through the signed-in browser for discovery, counterevidence, research-gap and timeline suggestions, and attempted checks of specific indexed full-text passages. Returned Methods/Results passages were reconciled with original-paper passages where available; failed retrievals, source substitutions and unverified aspects are recorded in the case reconciliation. Successful passage checks are distinguished from provider summaries. Provider screening counts, citation counts and meters were not used as primary counts or HSEF scores. This source log records access depth; it does not claim complete-paper or supplement review. The monthly API allowance was conserved: zero Consensus API calls in this batch.

REVIEWER NOTES

63 primary reports examined, including two original simulation and explicit biochemical/viral/transcription comparators; eight partial original-body examinations. FBL body credit covers original extended-data captions only, not unavailable main Methods/Results. Narrative PMID35243657 is excluded despite generic journal-article tagging. No complete-paper/supplement audit or blinded calibration claim.

Search leads, reviews, protocols and correction notices do not pad the primary count. Downloaded XML does not earn examination credit. Linked notices remain attached; unexamined correction details limit inference. This is a coordinator source/claim consistency assessment, not independent blinded calibration.

ADVERSARIAL REVIEW AND APPROVAL

Authoring model: Sol 6.1. Adversarial reviewer: Claude Opus 5.5 (Anthropic). Date: 2026-10-14 (Round 2, group 12). Scope of checks: 63/63 reference PMIDs verified against PubMed metadata (0 failed, 0 retractions or expressions of concern); 12 load-bearing claims spot-checked against abstracts or the review's declared partial-body receipts; scoring logic re-derived against hsef-framework.md and the v5.3 SKILL (caps, pre-registered weakest-link aggregation, role derivation, upward ladder, M/S/D artifacts); the known upstream defects and the 9 October revision regressions screened.

ID Severity Location Original to corrected Basis
AR-1 Major Consensus provenance reconciliation block (review) and consensus-addendum.md "The earlier adversarial approval refers to its original edition" to "No earlier adversarial approval is attached to this case" Revision-introduced regression. The sentence was spliced in unconditionally by the 9 October integration step. The earlier edition (hsef_v53_popularity_ranks_31_35_2026-10-08/llps-nuclear-bodies/) contains no ADVERSARIAL REVIEW AND APPROVAL section and no adversarial banner, so there is no earlier approval to refer to.
AR-2 Major AT A GLANCE Momentum column; "Final score, causal direction and M/S/D"; score card extended_scoring_MSD.momentum "Decisive work underway" to "Mechanistic only" Every item in the required artifact is a completed publication, and the review's own text states that no currently recruiting study is asserted. A completed publication cannot satisfy "someone is running an experiment that could cross the next threshold" (lead policy, 2026-10-14). The named work also does not attempt the boundary check this review itself identifies as decisive, a liquidity-only matched functional rescue across the preregistered body classes, so the framework's "Mechanistic only" row applies. Momentum modifies no letter.
AR-3 Minor Score card final_score.confidence_rationale (3 occurrences) "density, heterogeneous controls and incomplete access set the confidence" to a rationale stated on evidence-density and reproducibility grounds, with access explicitly excluded Lead two-step test applied. Step 1: access depth is struck as a determinant, since how much of a paper the reviewer could read is neither evidence density nor reproducibility. Step 2: the band is re-derived from what remains and stays at Moderate, because the review documents substantive evidence-quality reservations of its own — probe- and timescale-dependent material measurements, physical assays resting on expressed optogenetic constructs, a shared haploid-cell and investigator platform for the paraspeckle line, mixed liquid and partly solid phases within one body, and the demonstrated non-specificity of hexanediol and classical FRAP. Those are legitimate determinants, so High is not reached.
AR-4 Minor Final score block Divergence line; score card extended_scoring_MSD.divergence.justification Value unchanged at Contested; the checkable artifact naming the two conflicting framings added Divergence is computed, not felt, and Contested requires showing that the field is genuinely split. Both prose and score card previously asserted only the absence of an arithmetic gap. The split here is sharp and internal to the field: review and grant framing treats phase separation as the established organizing principle, while the methodological literature argues the standard diagnostics cannot distinguish controlled demixing from clustered binding at all.
AR-5 Editorial Inventory items [3] and [46]; the matching evidence cards; three score-card ledger rows each "erratum30849377" and "erratum29654784" to "erratum PMID30849377" and "erratum PMID29654784" (10 instances) The "randomize3808" rendering class, fusing the label to the erratum's PMID and leaving the identifier unmarked. The flag content is correct and the review already states that the linked details were not examined. Gene, protein and body names, DOIs and PMIDs were left untouched.

Rejected findings (checked, no change)

  1. Level and aggregation. Weakest-link is pre-registered and applied as written: Γ comes from SC3, the lowest subclaim, exactly as the rule requires, and the scoped SC1 Ε and SC2 Δ results are reported separately rather than promoted. The required alternatives are both reported (primary-subclaim Δ, scope-matched Δ), and the derivation wording states correctly that the broad class-general scope is what the headline grades. Δ rejected for the broad claim: the only endogenous state-specific functional result is a single nucleolar opto-gelation experiment with selective processing impairment and no light-off rescue. Β rejected: native physical measurements, composition-dependent partitioning and the NEAT1 architectural tests supply real mechanistic content.
  2. Scope-matched misreading. Checked specifically against the known defect. The headline is set by weakest-link, not by the scoped Ε subclaim, so the error of letting a scope-restricted Ε carry a broadly scoped headline does not arise here; the Ε result is explicitly confined to endogenous nucleolar demixing.
  3. "Best-supported rival" renderer bug. Checked and absent. The score card marks models_evaluated[0] as is_nominal: false, rank 1 (Pluralist soft-matter mechanisms, Ε), so the printed rival is genuinely the highest-ranked non-nominal model; the nominal (Macroscopic LLPS, Γ) sits at rank 2.
  4. Causal role. reinforcing / stabilizing factor is correct by the derivation procedure, which reaches it at step 5: condensation and material organization change assembly and throughput in selected contexts without unique necessity across body classes, and the review says so explicitly.
  5. REVIEWER NOTES / Consensus contradiction. Absent here. METHODS AND CONSENSUS CONTRIBUTION states that Consensus was used through the signed-in browser with zero API calls, and REVIEWER NOTES records the examination counts and the FBL extended-data-only credit without denying that Consensus work was done. The two blocks agree, so no scoping edit was needed.
  6. Attribution of the twelve load-bearing claims. All matched, including ones a looser reading would overstate: SON depletion giving only partial speckle disassembly while SON plus SRRM2 co-depletion dissolves them near-completely, with the SC35 antibody's main target being SRRM2 (33095160); paraspeckles explained and predicted as amphipathic block copolymer micelles under NEAT1_2 domain deletion and transcriptional modulation (33885174); NEAT1 middle-domain requirement with NONO tethering rescue that itself requires the NOPS dimerization domain (29932899); FBL acting through its phase-separation domains rather than its methyltransferase or acetylation domains (38745030); coilin depletion rescued by mature snRNPs, with snRNAs necessary but not sufficient (20357773); a liquid-like granular component against a partially viscoelastic-solid dense fibrillar component and fibrillar centre (40434645); hexanediol inactivating kinases and phosphatases at the concentrations used to dissolve condensates (33814344); hexanediol and classical FRAP failing to distinguish phase separation from clustered binding while calibrated half-FRAP succeeds (36526633); ATP-dependent nucleolar viscosity and a coalescence-derived power-law size distribution in amphibian oocytes (21368180); extranucleolar droplets in C. elegans embryos (26351690); the absence of a fixed single-component saturation concentration in a multicomponent condensate (32405004); and gelled nucleoli that no longer coalesce yet still permit small-protein mobility, with specific rRNA-processing alterations (31399547).
  7. Citation years. References 36 (2020/2021) and 58 (2010/2011) differ from the PubMed e-pub year by one. Rejected per convention.
  8. v5.claim_form WARN ("phenomenon"). Rejected per convention: the registered restatement is a declarative causal proposition stating both that phase separation assembles and organizes nuclear bodies and that the liquid state itself confers their compositional and functional properties.
  9. Collective-author defect, empty DOI: . fields, "PMIDnot supplied", retrieval artifacts. Screened across all 63 references, the timeline and the evidence cards; none present.

Residual limitations

The FBL case rests on public extended-data captions only, which the review states plainly; its main Methods, Results and supplements were unavailable and the surrounding inference is correspondingly bounded. Several quoted figures elsewhere (the 46S and 45S accumulation at 24 to 72 hours, the 12 of 13 HMGB1 variants, the roughly 1 angstrom per second radial rRNA velocity) are Methods or Results level and confirmable here only against the review's own partial-body receipts. Access depth is unchanged (8 partial-body, 55 complete abstract/status). The single validator WARN is the rejected claim-form false positive.

Approval: Following adversarial review and the corrections listed above, the revised document is approved. — Claude Opus 5.5 (Anthropic), 2026-10-14.

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Source-specific evidence cards

[1] Coexisting Liquid Phases Underlie Nucleolar Subcompartments.

Shows: Nucleolar GC/DFC have distinct fusion dynamics, low surface tension and reconstituted immiscible phases; concentration/domain manipulations alter organization.

Does not show: Injection and domain changes affect binding/valency; FIB1 deletion can localize by native co-recruitment. Assembly physics does not alone prove function requires liquid state.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph2, 1:Results:paragraph3, 1:Results:paragraph11, 1:Results:paragraph13, 1:Results:paragraph15, 1:Results:paragraph17, 1:Results:paragraph18. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[2] Aberrant phase separation and nucleolar dysfunction in rare genetic diseases.

Shows: HMGB1 frameshifts replace an acidic tail with basic residues, cause nucleolar mispartitioning and alter rRNA biogenesis; 12/13 tested variants enhance partitioning.

Does not show: Charge, interaction targets and location change together; not liquidity-only loss/rescue across body classes.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[3] Liquid Nuclear Condensates Mechanically Sense and Restructure the Genome.

Shows: CasDrop optogenetic condensates exclude/pull chromatin and prefer softer genomic regions.

Does not show: Engineered IDR/optogenetic assembly, not unmodified endogenous nuclear bodies; linked erratum PMID30849377 details unexamined.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. ErratumIn: PMID30849377. Subclaims: SC1, SC3.

[4] Composition-dependent thermodynamics of intracellular phase separation.

Shows: Dense/dilute concentration and transfer-energy measurements show heterotypic composition-dependent partitioning; fixed single-component saturation is absent, with RNA/transcription and valency contrasts.

Does not show: Increased expression and ActD influence substrate supply; multicomponent nonfixed saturation is not disproof of LLPS, while partitioning is not liquid-state functional rescue.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 2:Main text:paragraph0, 2:Main text:paragraph3, 2:Main text:paragraph4, 2:Main text:paragraph5, 2:Main text:paragraph6, 2:Main text:paragraph7. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[5] Macromolecular condensation organizes nucleolar sub-phases to set up a pH gradient.

Shows: Charge patterns and RNA binding organize subphases and nucleolar pH gradients.

Does not show: Binding/coacervation/composition vary together; a pH difference does not uniquely identify liquidity-dependent biological output.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[6] Phase separation-competent FBL promotes early pre-rRNA processing and translation in acute myeloid leukaemia.

Shows: FBL domain rescues link condensation-competent architecture to growth and rRNA processing; public extended-data captions report failed hnRNPA1-PLD substitution and retained FRAP for catalytic mutants.

Does not show: Main body/supplements not accessible; only original extended-data captions examined. Phase competence alone is insufficient in the failed PLD rescue, and drug/charge/binding specificity remains.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Publisher HTML paragraphs:paragraph202, 0:Publisher HTML paragraphs:paragraph204, 0:Publisher HTML paragraphs:paragraph206, 0:Publisher HTML paragraphs:paragraph208, 0:Publisher HTML paragraphs:paragraph212. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[7] Phase transition of fibrillarin LC domain regulates localization and protein interaction of fibrillarin.

Shows: FBL phenylalanine substitutions impair liquid/hydrogel assembly, DFC location and partner interactions.

Does not show: Both hydrogel and liquid states fail alongside binding; expressed mutant is not endogenous liquidity-only rescue.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[8] The nucleolus functions as a phase-separated protein quality control compartment.

Shows: Misfolded proteins enter nucleolar GC, with Hsp70-dependent recovery and prolonged-stress solidification/quality-control failure.

Does not show: Stress, chaperone function and damage vary together; no isolated material-state requirement at normal homeostasis.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[9] Nascent Pre-rRNA Sorting via Phase Separation Drives the Assembly of Dense Fibrillar Components in the Human Nucleolus.

Shows: FBL RNA binding/GAR self-association organizes nascent pre-rRNA traffic and DFC clusters.

Does not show: RNA binding, self-association and localization are coupled; functional condensate contribution does not show simple-liquid exclusivity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[10] Size conservation emerges spontaneously in biomolecular condensates formed by scaffolds and surfactant clients.

Shows: Scaffold/surfactant-client simulations yield size-conserved multiple droplets or coarsening depending on ratio.

Does not show: Computational existence of size arrest is not endogenous body demonstration; lack of coalescence alone cannot rule out liquids.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[11] Active liquid-like behavior of nucleoli determines their size and shape in Xenopus laevis oocytes.

Shows: Native nucleoli undergo fusion, deformation and ATP-sensitive viscous relaxation with coalescence-linked size distributions.

Does not show: Large amphibian oocytes are a restricted physical context; dynamic fluidity is not alone functional-state necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[12] Chromatin network retards nucleoli coalescence.

Shows: Hi-C-parameterized genome simulations predict nucleolar nucleation/arrest and a metastable two-droplet state.

Does not show: Model agreement with physical measures does not prove all nuclear bodies demix; chromatin arrest can mimic non-coarsening phenotypes.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[13] Paraspeckles are constructed as block copolymer micelles.

Shows: NEAT1 end deletions at comparable expression remove core-shell order, enlarge and round paraspeckles; WT versus mutant transcription responses fit micelle predictions.

Does not show: Restricted HAP1/mutant model; micellization is microphase separation, not absence of all phase behavior. RNA-domain changes can alter interactions, and global function not tested.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Publisher HTML paragraphs:paragraph24, 0:Publisher HTML paragraphs:paragraph28, 0:Publisher HTML paragraphs:paragraph29, 0:Publisher HTML paragraphs:paragraph30, 0:Publisher HTML paragraphs:paragraph31, 0:Publisher HTML paragraphs:paragraph33. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[14] Functional Domains of NEAT1 Architectural lncRNA Induce Paraspeckle Assembly through Phase Separation.

Shows: CRISPR NEAT1-domain deletion and NONO dimer-domain-dependent tether rescue establish multivalent assembly; selected fragments form in vitro aggregates.

Does not show: RNA-protein enrichment/assembly rescue, with hexanediol sensitivity, does not distinguish a liquid state from micelle/polymer-scaffold organization.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[15] Structural, super-resolution microscopy analysis of paraspeckle nuclear body organization.

Shows: Paraspeckles have ordered radial core-shell NEAT1/protein organization; FUS loss fragments them.

Does not show: Radial morphology and loss of scaffold cohesion do not alone distinguish all physical models or establish material-state function.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[16] Unusual semi-extractability as a hallmark of nuclear body-associated architectural noncoding RNAs.

Shows: Needle shearing/heating improves NEAT1 recovery about 20-fold; FUS prion-like interactions affect semi-extractability.

Does not show: Extraction tenacity and estimated transcript numbers do not measure liquid versus gel state in living cells.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[17] CRISPRa-mediated NEAT1 lncRNA upregulation induces formation of intact paraspeckles.

Shows: NEAT1 promoter activation in two lines increases intact core-shell paraspeckles.

Does not show: Endogenous locus activation changes abundance; it does not isolate liquid-state functional necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[18] Integrator restrains paraspeckles assembly by promoting isoform switching of the lncRNA NEAT1.

Shows: Integrator cleavage changes NEAT1 isoforms and restrains paraspeckle assembly.

Does not show: Broad RNA-processing mediator; no liquid-state-specific intervention or complete functional rescue.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[19] SRRM2 phase separation drives assembly of nuclear speckle subcompartments.

Shows: SRRM2/SON form immiscible subcompartments; oligomerizable synthetic modules replace RS assembly roles while serines tune liquidity and target splicing.

Does not show: Original abstract only in this packet. Synthetic oligomer rescue of assembly is not automatically matched liquid-state functional rescue; distinct splicing factors have nonredundant direct functions.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[20] Disruption of nuclear speckle integrity dysregulates RNA splicing in C9ORF72-FTD/ALS.

Shows: C9 repeat RNA/DPRs alter speckle dynamics and sequester SRRM2; integrity loss changes splicing and neuronal viability.

Does not show: Disease toxicity and factor sequestration alter binding/abundance globally; cannot isolate liquid-state-only causation.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[21] SON and SRRM2 are essential for nuclear speckle formation.

Shows: SON/SRRM2 co-loss disperses multiple speckle markers without comparable Cajal loss; original shows SC35 chiefly recognizes SRRM2 and truncation alone can remove SC35 staining without dissolving speckles.

Does not show: Protein loss and antibody epitope loss must be separated from body loss; scaffold requirement is not proof that liquidity itself is essential.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph9, 1:Results:paragraph15, 1:Results:paragraph17, 1:Results:paragraph31, 1:Results:paragraph32, 1:Results:paragraph48. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[22] Phosphorylation-dependent charge blocks regulate the relaxation of nuclear speckle networks.

Shows: SRRM2 charge blocks alter network relaxation without markedly shifting condensation threshold; CK2 phosphorylation is linked to splicing after DNA damage.

Does not show: Abstract-only quantitative/rescue details; CK2 has many substrates and charge edits alter interactions. Supports a stronger state-function test but not broad common-liquid generality.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[23] Cycles of protein condensation and discharge in nuclear organelles studied by fluorescence lifetime imaging.

Shows: Nuclear-body component concentrations fluctuate synchronously across cells' organelles.

Does not show: Concentration cycles and fluorescence environment are not direct demixing or causal material-state tests.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[24] Nuclear speckles regulate functional programs in cancer.

Shows: HIF2alpha speckle-targeting motifs influence selected ccRCC transcriptional programs; speckle states correlate with outcomes.

Does not show: Motif-mediated spatial targeting and tissue state do not isolate liquidity, and prognostic association is not therapeutic primacy.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2.

[25] Malat1 is not an essential component of nuclear speckles in mice.

Shows: Malat1 knockout mice retain speckle markers and normal baseline viability/fertility, with context-specific NEAT1 changes.

Does not show: Baseline absence phenotype does not exclude stress-specific function or all alternative RNA contributions; scaffold redundancy matters.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[26] Detecting and quantifying liquid-liquid phase separation in living cells by model-free calibrated half-bleaching.

Shows: Controlled LLPS and clustered-binding systems show classic FRAP/hexanediol are nondiagnostic; calibrated half-FRAP probes preferential internal mixing.

Does not show: Interfacial barriers vary by body and probe; benchmark specificity is not itself full-body functional proof.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[27] Phase-separation antagonists potently inhibit transcription and broadly increase nucleosome density.

Shows: Both 1,6-HD and nominal-control 2,5-HD suppress coalescing/noncoalescing gene transcription and increase nucleosome density.

Does not show: Dose/temperature/organism-specific off-target effect; does not invalidate all orthogonal LLPS studies.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[28] 1,6-hexanediol rapidly immobilizes and condenses chromatin in living human cells.

Shows: Hexanediol dose-dependently immobilizes/hypercondenses chromatin; 5 percent or more freezes tested chromatin motion.

Does not show: A distinct chromatin effect, not universal evidence against condensates; lower concentrations still require assay-specific validation.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[29] RNA polymerase II condensate formation and association with Cajal and histone locus bodies in living human cells.

Shows: PolII clusters form near CB/HLB; coilin knockout changes associations without PC number/timing changes, and PC removal leaves CB/HLB.

Does not show: Hexanediol-based liquidity ranking is not definitive; demonstrates separable assembly dependencies, not proof that CBs never phase separate.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[30] Time-dependent effect of 1,6-hexanediol on biomolecular condensates and 3D chromatin organization.

Shows: 1.5 percent short treatment dissolves bodies with different chromatin-contact effects than longer exposure/aggregation.

Does not show: Retained viability does not rule out kinase/transcription off-targets; neither dose nor 2,5-HD is universally specific.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[31] 1,6-Hexanediol, commonly used to dissolve liquid-liquid phase separated condensates, directly impairs kinase and phosphatase activities.

Shows: Structured low-concentration kinases and IDR-deleted P-TEFb are inhibited by hexanediol; dilution restores activity and kinase inhibition can preserve CTD droplets.

Does not show: Tested enzymes/protocol, not direct cellular degree estimate. Reversibility does not make solvent effects LLPS-specific.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Results:paragraph2, 0:Results:paragraph3, 0:Results:paragraph5, 0:Results:paragraph6, 0:Results:paragraph13, 0:Results:paragraph16. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[32] lncRNA SLERT controls phase separation of FC/DFCs to facilitate Pol I transcription.

Shows: SLERT favors closed DDX21 conformation and loose clusters linked to FC/DFC fluidity and PolI processivity.

Does not show: Helicase conformation, multimerization and RNA binding are inseparable in these selected abstract claims; no body-general liquid-state inference.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[33] Viscoelasticity and advective flow of RNA underlies nucleolar form and function.

Shows: Slow directional RNA motion and approximately 5000-fold RNA/NPM1 diffusivity differences support entangled RNA with rapid protein movement through its mesh.

Does not show: RNA labeling, washout, noise floor and maturation mixtures limit inferred transport parameters. Maxwell-fit/gel interpretation is model-supported, not proof every constituent is solid.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 1:RESULTS:paragraph3, 1:RESULTS:paragraph4, 1:RESULTS:paragraph6, 1:RESULTS:paragraph7, 1:RESULTS:paragraph10, 1:RESULTS:paragraph11, 1:RESULTS:paragraph12. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[34] DDX18 coordinates nucleolus phase separation and nuclear organization to control the pluripotency of human embryonic stem cells.

Shows: DDX18 loss disrupts nucleolar/chromatin organization; NoCasDrop targeted condensation restores selected centromere/heterochromatin readouts.

Does not show: Synthetic rescue of structure, not necessarily pluripotency or material-state-only rescue; helicase/RNA binding and transcription confounds.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[35] LncRNA-splicing factor condensates regulate hypoxia-responsive pre-mRNA processing near nuclear speckles.

Shows: MALAT1 modulates SRSF1/pre-mRNA interactions and condensation near speckles with hypoxia-responsive splicing.

Does not show: PubMed journal issue is dated 19 March 2026, before the cutoff; earlier preprint is the same work. Interaction/recruitment specificity versus liquid state remains, original body not examined.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. UpdateOf: PMID39554052. Subclaims: SC1, SC2.

[36] RNA-Mediated Feedback Control of Transcriptional Condensates.

Shows: RNA amount promotes then dissolves transcriptional condensates, consistent with nonequilibrium feedback.

Does not show: Transcriptional cluster comparator, not the canonical body classes' universal assembly or liquidity function.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[37] Imaging dynamic and selective low-complexity domain interactions that control gene transcription.

Shows: Physiological dynamic LCD hubs stabilize binding and recruit PolII without detectable macroscopic phase separation.

Does not show: Local hubs at tested loci do not rule out other bodies or nanoscopic condensation; a distinct comparator rather than nucleolar null.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[38] Pol II phosphorylation regulates a switch between transcriptional and splicing condensates.

Shows: CTD phosphorylation shifts partition preference from mediator to splicing-factor condensates.

Does not show: Phosphorylation also regulates conventional binding/enzymatic activity; not unique evidence of an endogenous required liquid phase.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[39] Nucleation by rRNA Dictates the Precision of Nucleolus Assembly.

Shows: rRNA transcription seeds precisely timed nucleoli; without rDNA, variable high-concentration assemblies still arise.

Does not show: Seeding and phase behavior can cooperate; activity-defined formation does not alone isolate physical state required for function.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[40] Alu element-containing RNAs maintain nucleolar structure and function.

Shows: Alu RNA depletion disrupts nucleolar structure/rRNA transcription, while added RNA increases size and pre-rRNA.

Does not show: RNA scaffold and PolII/PolI cross-talk are changed together; not liquid-state-selective necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[41] Chromatin localization of nucleophosmin organizes ribosome biogenesis.

Shows: Fkbp39 chromatin localization/binding directs nascent 60S partition and improves ribosomal assembly.

Does not show: Native sorting and binding are causal in yeast, but liquidity-only separation and broad body generality are untested here.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[42] Mapping and engineering RNA-driven architecture of the multiphase nucleolus.

Shows: Sequential processing maps spatial maturation; engineered SSU defects invert layers and prevent outflux, while LSU precursors build the outer layer.

Does not show: Synthetic rDNA plus processing perturbation changes substrate architecture itself; supports RNA-programmed structure rather than universal simple-liquid necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. UpdateOf: PMID39386460. Subclaims: SC1, SC2, SC3.

[43] RNA promotes the formation of spatial compartments in the nucleus.

Shows: RD-SPRITE identifies RNA territories; selected RNAs recruit regulators and alter contacts/function.

Does not show: Spatial enrichment and binding-guided assembly do not uniquely identify demixing versus scaffold-driven territories.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[44] Coilin-dependent snRNP assembly is essential for zebrafish embryogenesis.

Shows: Coilin loss disperses CB, impairs snRNP production and arrests development; mature human snRNPs restore mRNA/viability while RNA alone does not.

Does not show: Product bypass shows CB-associated assembly is useful yet not an irreplaceable liquid prerequisite; depletion is not a material-state edit.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[45] Cajal bodies are linked to genome conformation.

Shows: CB RNAi disassembly changes gene clustering/expression and increases splicing noise.

Does not show: Coilin/assembly loss and snRNP supply explain effects without requiring phase-state-specific causation.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

[46] The mechanisms of PML-nuclear body formation.

Shows: PML addback restores bodies, and SUMO-binding/RING mutants alter nucleation/recruitment.

Does not show: SUMO architecture versus liquid state not separated; linked erratum PMID29654784 metadata checked but details unavailable.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. ErratumIn: PMID29654784. Subclaims: SC1, SC2.

[47] Phase separation is required for PML nuclear body biogenesis and function.

Shows: A216V/L268P compare dynamics, packing, recruitment/PTMs and stress/senescence outputs with retained overall RBCC oligomerization.

Does not show: Important positive variant comparison, but FRAP is not alone LLPS proof and altered binding/packing may change output; original body unavailable.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[48] Self-interaction of NPM1 modulates multiple mechanisms of liquid-liquid phase separation.

Shows: NPM1 conformation changes valency and switches competing homo/heterotypic LLPS mechanisms.

Does not show: Biophysical reconstitution is not endogenous liquid-state-selective function or cross-class necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[49] Nucleophosmin integrates within the nucleolus via multi-modal interactions with proteins displaying R-rich linear motifs and rRNA.

Shows: Multivalent acidic motifs, oligomerization and RNA-binding domains drive NPM1 coassembly and nucleolar localization.

Does not show: Loss of interaction/localization is not selective loss of liquidity while retaining same clients/function.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[50] Compositional adaptability in NPM1-SURF6 scaffolding networks enabled by dynamic switching of phase separation mechanisms.

Shows: Crowding/concentration modulates interconversion of homo/heterotypic scaffolding networks.

Does not show: Proposed vectorial output is not directly established by this in vitro network alone.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[51] C9orf72 Poly(PR) Dipeptide Repeats Disturb Biomolecular Phase Separation and Disrupt Nucleolar Function.

Shows: PolyPR binds NPM1 acidic regions, dissolves in vitro droplets and disperses cell NPM1 while trapping RNA statically.

Does not show: Broad pathogenic interactions, not an isolated physiological liquid-state perturbation/rescue.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[52] Bridging-induced phase separation induced by cohesin SMC protein complexes.

Shows: Liquid-like cohesin-DNA clusters depend on DNA length above 3 kb, supporting bridging-induced condensation.

Does not show: DNA polymer comparator, not direct paraspeckle/Cajal mechanism; fusion/FRAP do not uniquely identify protein LLPS.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[53] Evidence for DNA-mediated nuclear compartmentalization distinct from phase separation.

Shows: HSV replication compartments concentrate PolII through accessible DNA/rebinding despite unrestricted interfacial diffusion.

Does not show: Viral compartment context, not native nucleolar null; provides a mechanism that reproduces misleading puncta phenomenology.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[54] Genome organization around nuclear speckles drives mRNA splicing efficiency.

Shows: Speckle proximity predicts more spliceosome binding, and directed pre-mRNA recruitment increases splicing.

Does not show: Spatial concentration is functionally sufficient in the tested assay, but does not identify liquidity as the causal feature; preprint is not separate replication.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. UpdateOf: PMID36711853. Subclaims: SC2.

[55] SRRM2 organizes splicing condensates to regulate alternative splicing.

Shows: EGFP-SRRM2 knock-in dynamics and depletion link scaffold to selected exon splicing, viability and differentiation.

Does not show: SRRM2 is itself a spliceosome protein; generic factor loss is not liquid-state-only necessity, and sphere/FRAP criteria are incomplete.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[56] Disruption of nuclear speckles reduces chromatin interactions in active compartments.

Shows: SRRM2 depletion disperses speckles and changes active-compartment interactions and 1282 genes; contact changes do not track expression changes.

Does not show: Broad scaffold/splicing loss and uncoupled contacts constrain unique material-state interpretation.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2.

[57] De novo formation of a subnuclear body.

Shows: Multiple structural or functional CB components nucleate apparently functional bodies when immobilized on chromatin.

Does not show: Nonhierarchical self-organization does not prove LLPS; tethered high local concentration is engineered.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[58] Direct visualization of the co-transcriptional assembly of a nuclear body by noncoding RNAs.

Shows: Nascent NEAT1 transcription recruits functional paraspeckle proteins and retains mRNAs; continued transcription supports maintenance.

Does not show: RNA platform and activity-dependence do not specify a bulk liquid or forbid microphase separation.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[59] Controlling the material properties and rRNA processing function of the nucleolus using light.

Shows: Endogenous-locus NPM1-Cry2olig cells accumulate 46S/45S and lose downstream precursors relative to light controls; activated mesh hinders large complexes while small-protein mobility persists.

Does not show: Processing assay uses 24–72 h light with general toxicity normalized; concentration/percolation and new interactions vary. Selected body shows no matched light-off functional rescue, and processing is selectively impaired rather than globally absent.

Access/status: Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Publisher HTML paragraphs:paragraph19, 0:Publisher HTML paragraphs:paragraph21, 0:Publisher HTML paragraphs:paragraph24, 0:Publisher HTML paragraphs:paragraph26, 0:Publisher HTML paragraphs:paragraph28, 0:Publisher HTML paragraphs:paragraph30, 0:Publisher HTML paragraphs:paragraph32, 0:Publisher HTML paragraphs:paragraph34, 0:Publisher HTML paragraphs:paragraph31, 0:Publisher HTML paragraphs:paragraph33, 0:Publisher HTML paragraphs:paragraph35, 0:Publisher HTML paragraphs:paragraph37, 0:Publisher HTML paragraphs:paragraph40. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2.

[60] Micropipette aspiration reveals differential RNA-dependent viscoelasticity of nucleolar subcompartments.

Shows: Micropipette aspiration shows liquid-like GC but partly solid-like DFC/FC; RNase fluidizes internal phases and changes tension.

Does not show: Restricted oocyte/aspiration context; RNA destruction changes substrate and interactions along with rheology, not selective functional rescue.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

[61] Anomalous coarsening of coalescing nucleoli in human cells.

Shows: Chromatin depletion/flow accompanies coalescing nucleoli; short-range attraction models anomalous volume distribution.

Does not show: Model-supported attraction and coarsening, not biological-function necessity or universally equilibrated liquid droplets.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[62] RNA transcription modulates phase transition-driven nuclear body assembly.

Shows: Cell-size/concentration perturbation and nucleolar/extranucleolar kinetics agree with phase-transition predictions modulated by rRNA transcription.

Does not show: Embryonic worm regime and active seeding; doesn't show every nuclear body shares the same physics.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

[63] Compositional Control of Phase-Separated Cellular Bodies.

Shows: Changing scaffold ratio/valency switches client composition in reconstitutions/cells, with analogous PML/P-body partitioning.

Does not show: Analogous natural partitioning is not identical physical proof, and synthetic-liquid compositional control is not body-general liquid necessity.

Access/status: Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

Documentary record

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