# HSEF v5.3 review: 3D Genome Folding as Regulatory Determinant

> Sources: 60 primary reports; claims: 64; verified: 64; unverified: 0. Verification is bounded attribution. Access: 11 partial-body and 49 complete abstract/status examinations. Literature cutoff: 2026-10-08; source examination UTC date: 2026-10-09. 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. 6 corrections applied (see ADVERSARIAL REVIEW AND APPROVAL). Status: **Approved as revised.**

## AT A GLANCE

**3D genome features are real and specific architectural changes regulate defined loci; broad topological primacy over mammalian transcription is not established.**

| Level | Confidence | Causal role | Momentum | Stability | Divergence |
|---|---|---|---|---|---|
| Γ — Mechanistically plausible, partial system support | Moderate | permissive factor | Mechanistic only | Stable | Contested |

**Deciding experiment:** Preregister representative endogenous loci across two mammalian lineages, proximal/distal enhancers and activation/maintenance. Cross acute topology-specific edits or separation alleles with biochemical-only defects, and independently restore architecture without restoring original cofactor surfaces.

**Belief versus evidence:** The preregistered scope-matched gate is SC3, yielding Γ. SC2 reaches Ζ through independent endogenous boundary edits, allele-resolved human/mouse developmental tests and locus-directed functional rescue, interpreted as architectural contribution rather than a sole switch. SC1 is an existence statement: Β records robust structural observation without pretending existence itself proves regulatory causality. Its empirical reality is well established and is not refuted by this causal ladder.

**Best-supported rival:** Transition-dependent architecture with maintenance redundancy. During a defined transition, orthogonally restore native topology while retaining a biochemical-deficient factor, and restore factor chemistry while blocking topology. Paired nascent output, live distance and activation-history readouts would distinguish instructive topology from permissive access and molecular memory.

## COMPETING MECHANISTIC MODELS

**Rank 1: Transition-dependent architecture with maintenance redundancy (Ε).** Architecture facilitates particular activation transitions while established output can persist. Distant Shh activation, neuronal gene classes and promoter CTCF rescue support restricted necessity (36097291,35471149,33398174). Not all immediate-early activation requires cohesin; protein chemistry remains intertwined.

**Rank 2: Permissive enhancer access with biochemical compatibility (Ε).** Architecture shapes opportunities and insulation, while competent enhancer/promoter biochemistry determines output. Boundary-preserving developmental controls and LDB1 looping/activation separation (25959774,24874989). Forced native globin activation and selected boundary edits show architecture can exert stronger instructive effects (22682246,38452764).

**Rank 3: Transcription-first architectural remodeling (Δ).** Transcription can generate or alter fine chromatin features, creating reciprocal causality. Transcription inhibition disrupts fine Micro-C features and temporal maps show reciprocal dynamics (32213323,36323252). Many higher structures and microcompartments persist without transcription; drugs have indirect effects (37157000).

**Rank 4: Affinity-driven compartmentalization (Γ).** Compatible chromatin states and regulatory factors coalesce independently of loop extrusion. Polycomb contacts and nested microcompartments persist after cohesin loss (31968256,37157000). A contact pattern is not by itself proof of thermodynamic phase separation or global transcriptional mechanism.

**Rank 5: Topological primary switch (Γ).** Folding broadly initiates and rate-limits mammalian transcription. Local boundary pathology and forced globin activation are its strongest original cases (25959774,22682246). Maintained nascent output and looping-intact inactive globin challenge broad sufficiency/necessity (36471071,24874989).

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

Three-dimensional genome folding is a primary causal determinant of transcriptional regulation across mammalian loci.

Topology existence and locus-specific function are scored separately from broad regulatory primacy. Defined baseline loci and folding features, not loci selected for a positive expression response, establish scope. Global architectural-protein depletion does not isolate topology from protein biochemical activity.

Selection: public-interest rank 43 from the editorial ranking compiled 2026-09-23; categorical prior verdicts were visible. Private fresh review; earlier documents are preserved.

### Evidence and causal interpretation

Structural reality and regulatory primacy are distinct. Hi-C, 5C, super-resolution tracing and genome-scale imaging reproducibly identify domains and compartments, while live Fbn2 shows a dynamic rather than permanent loop state (19815776,22495300,22495304,30361340,32822575,35420890). Original Hsieh Methods explicitly notes that contact dots need not be loop-shaped bridges (36471071). Existence SC1 is well corroborated; its Β causal-ladder entry does not mean those observations are refuted.

The strongest endogenous functional evidence comes from selected regulatory landscapes. Human limb variants recreated in mice misdirect Epha4 enhancers, whereas boundary-preserving shorter deletions retain normal expression and limbs (25959774). Serial inversions and anchor deletion rescue add a functional in vivo discriminator (30742094). Native CTCF motif inversions and human erythroid boundary deletion further alter enhancer access and gene output (26276636,34585664). These are real causal contributions with defined scope.

Forced LDB1 recruitment supplies an independent intervention class at the native globin locus. Original Deng Results show LCR-deleted alleles fail reactivation and homozygous controls resolve residual primer cross-reactivity (22682246). Human adult erythroblasts and sickle-cell-derived cultures extend the context, with changes in burst fraction and hypoxic sickling (25126789,27067601,27405777). They share a tethering programme and are not three independent proof classes or in vivo patient efficacy.

Contact sufficiency is specifically constrained. LDB1 DD4/5 restores looping but not promoter Pol II or transcription, while preserving LMO2 interaction and losing FOG1 interaction (24874989). TATA deletion and activation-deficient LDB1 also preserve contacts without activation (28520978). The correct inference is that architectural opportunity requires biochemical competence, not that native contacts are meaningless.

Zuin quantifies a useful nonlinear contact-output relation, but the original assay places eGFP and Sox2/SCR sequences inside a neutral TAD with two internal CTCF sites deleted (35418676). Probabilities are inferred from founder contact maps and bursting parameters fit a two-state model. This is controlled reporter evidence and cannot by itself establish endogenous genome-wide primacy.

Acute global loss offers important scope tests. Original Hsieh profiles nascent RNA and mature RNA at 0/3/12/24 hours: around 50, five and two transcripts change after three-hour CTCF, RAD21 and WAPL depletion, respectively; changes rise later (36471071). Most fine enhancer-promoter contacts persist. YY1 also has limited short-term effects, and cohesin loss reduces TF target search. These data test maintenance of particular modes, not the disappearance of every possible regulatory contact or all activation.

Rao uses six-hour RAD21 degradation and finds most active genes (87%, under its 30% change criterion) relatively stable, while a biologically meaningful minority changes and superenhancer contacts reorganize (28985562). Loop aggregate signal disappears within 40 minutes and largely returns within an hour after withdrawal. Architectural reversibility is strong evidence for formation control; it does not automatically prove full gene-output rescue.

Nora finds loss of more than 80% of domain insulation with CTCF depletion, about 18% residual boundaries and maintained compartments with modest strength change (28525758). Expression changes rise from 370 genes at day 1 to 4,996 at day 4, when indirect effects grow. Many early downregulated promoters have direct CTCF binding, and transcriptome recovery after washout is incomplete. Calling this a universal transcriptional null or a clean topology-only rescue would both be wrong.

Adult hepatocyte Nipbl deletion avoids dividing-cell lethality, with no evident death/proliferation at the ten-day collection (29094699). Original Results report 637 downregulated and 487 upregulated genes plus 1,107 increased exogenic regions, even though TADs vanish equally in expression-stable regions. Compartments strengthen. The result separates structural modes and supports selective long-range regulatory disruption, not an unaffected transcriptome.

Positive activation tests must remain beside maintenance nulls. Synthetic distant Shh activation requires cohesin in a six-hour window, while promoter/proximal activation remains and 24-hour depletion causes death (36097291). CTCF residual binding remains at some boundaries. Neuronal immediate-early genes can activate without cohesin, whereas longer-loop secondary responses are more dependent (35471149). Promoter CTCF tether rescue and lineage-specific MYC effects provide further context (33398174,31127282).

Native negative edits also matter. Shh TAD/boundary changes preserve expression and development except when enhancers are removed or a larger deletion exposes a neighbor (31511252). Xist-neighbor inversions alter contacts with limited local output and selective cross-domain effects; Prdm14 activation can cross a prominent boundary without paused promoter looping (35502750,34197738). Drosophila balancers are corroborative counterexamples outside the mammalian gate (31308546).

Imaging constrains physical interpretations. Sox2 SCR deletion abolishes cis output, yet live distance is uncorrelated with contemporaneous bursts or a lag-aligned 25-minute window (31124784). Labels lie outside the exact regulatory elements and finite resolution cannot exclude brief/history-dependent encounters. Shh activation can increase distance, and Fbn2 inferred full-loop occupancy is roughly 3–6.5% with 10–30-minute median lifetimes and localization/censoring controls (31494034,35420890).

Mediator and BET tests separate tethering from activation; Polycomb contacts, nested microcompartments and LDB1 networks can persist without conventional extrusion factors (31402173,33431820,31968256,37157000,39721581). Transcription inhibition can disrupt fine folding without removing higher structures, consistent with reciprocal causality (32213323). Such contacts are not proof of LLPS or a primary global switch.

Broad enhancer mapping enriches causal regulation without isolating topology. CRISPRi enhancer screens test enhancer function, while the final 2026 ENCODE-rE2G resource contains over 92 million predicted links and 10,356 perturbation benchmark pairs, with promoter class and synergy beyond contacts (31784727,42457959). Its 2023 preprint is excluded from the count. Prediction breadth cannot substitute for topology-only perturbation.

The scope-matched conclusion is Γ for broad primacy, with Ζ for specific architectural contributions assembled across independent test classes. This preserves local developmental, erythroid and tumour-regulatory causality while rejecting transfer to a universal primary determinant. The next discriminating work is matched topology and biochemistry rescue across prespecified loci and activation histories.

## HYPOTHESIS STATE EVALUATION FRAMEWORK (HSEF v5.3)

<!-- consensus-consistency-2026-10-09 -->
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<!-- end-consensus-consistency -->


### Subclaim matrix and aggregation

| Subclaim | Scope | Level | Decision |
|---|---|---|---|
| SC1 Loops, domains and compartments are reproducible genome features. | cell state, assay and contact scale | Β | Independent contact maps, fixed-cell tracing and live-cell controls reproducibly reveal dynamic loops, domains and compartments. Β reflects the noncausal existence formulation; physical formation mechanisms have direct perturbational support but do not transfer to transcriptional primacy. |
| SC2 Specific folding features causally regulate transcription at defined loci. | locus and architectural feature defined before expression response | Ζ | Human structural variants recreated in mice, boundary-preserving controls, CTCF motif inversions and enhancer-dependent directed globin activation converge on causal contribution at defined endogenous loci. They fail differently; separation-of-function LDB1 controls show that contacts also require competent biochemistry. Ζ applies to specific architectural contributions, not universal necessity or contact sufficiency. |
| SC3 Folding is a primary regulatory determinant across mammalian loci. | prespecified lineages, activation and maintenance phases, and representative loci | Γ | Short-term nascent transcription and many fine enhancer-promoter contacts persist after loop-extrusion factor loss; large endogenous edits are often buffered. Positive local and activation-context effects do not establish broad rate-limiting primacy. Protein chemistry, activation/maintenance timing and compartment modes prevent a global topology-only inference. |

Preregistered aggregation: scope-matched. The preregistered scope-matched gate is SC3, yielding Γ. SC2 reaches Ζ through independent endogenous boundary edits, allele-resolved human/mouse developmental tests and locus-directed functional rescue, interpreted as architectural contribution rather than a sole switch. SC1 is an existence statement: Β records robust structural observation without pretending existence itself proves regulatory causality. Its empirical reality is well established and is not refuted by this causal ladder. Sensitivities: weakest-link Β; primary-subclaim Γ; scope-matched Γ.

### Decisive-perturbation inventory and causal tally

[2] Cohesin is required for synthetic activation from distant Shh enhancers, while promoter and proximal activation remain independent. Artificial activation and acute protein loss do not isolate topology from all protein functions; distance and context constrain necessity.

[3] Most enhancer-promoter interactions and nascent transcription remain after three-hour CTCF/cohesin/WAPL/YY1 depletion. Short-term maintenance is tested; activation and later effects remain open. Cohesin affects transcription-factor binding.

[5] Dose-dependent CTCF depletion and restoration change domain insulation; compartments persist and nondividing cells need CTCF for insulation. Physical insulation recovers but most expression changes do not fully reset after washout; early downregulated promoters show direct CTCF binding. Late viability and direct protein functions constrain topology attribution.

[21] LDB1 DD4/5 mutant preserves dimerization and looping but lacks transcriptional activation and coregulator recruitment. Matched separation at one locus constrains a loop-only explanation; mutation has identified biochemical consequences.

[23] LDB1 tethering reactivates native beta-globin, requiring the distant LCR. Artificial tethering in a deficient background can restore cofactor functions; locus requirement cannot establish universal primacy.

[29] Multiple Shh TAD/boundary edits leave expression and phenotype largely intact; one larger deletion affects neighboring Mnx1. Endogenous negative test; buffering, locus choice and larger-edit regulatory content limit generalization.

[34] Serial inversions create tissue-specific stripes, ectopic transcription and malformations; anchor deletion rescues phenotype. Endogenous functional test with rescue; selected enhancer-rich landscape and regulatory-sequence effects limit breadth.

[36] CTCF motif inversion reconfigures contacts and enhancer/promoter expression specificity. Local motif orientation preserves some sequence content but changes protein geometry; limited loci.

[43] Acute cohesin loss removes loop domains while compartments remain; restoration rapidly rebuilds loops, and only a minority of active genes changes. Short-term gene output and protein pleiotropy; physical-loop necessity does not establish broad transcriptional necessity.

[54] Human structural variants and recreated mouse alleles rewire enhancer access and developmental expression when boundaries are disrupted. Boundary-preserving shorter deletions retain normal limbs/expression, narrowing distance-only explanation; regulatory-content changes and selected developmental landscape still limit generalization.

[58] Adult hepatocyte Nipbl deletion removes TADs and peaks while compartments strengthen; 1,124 genes and 1,107 exogenic regions change, yet TADs also disappear in expression-stable regions. Chronic loader loss affects protein biology; liver context and residual fine structures must be retained.

[60] Sox2 requires SCR enhancer yet contemporaneous bursts do not correlate with enhanced spatial proximity. SCR deletion validates enhancer dependence and lag-aligned analysis is null within examined window; labels lie 5–8 kb from elements and finite spatial/time resolution cannot exclude brief or historical contacts.

Tally: 12 discriminating contrasts. Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines. Twelve especially discriminating positive/negative contrasts are flagged; this is not twelve independent positive proofs. SC2 positive threshold set is restricted to native locus/boundary or enhancer-dependent functional comparisons. Structural imaging, local expression associations and global nulls are not positive SC3 thresholds.

### Cap audit, precedence and Β/Γ/Δ boundary

Loop/contact enrichment and reporter-only behavior cap inference to broad endogenous regulation, while endogenous boundary/allele comparisons with functional outputs cross scoped causal thresholds. The assembled SC2 set is evaluated jointly; individual limitations do not re-cap a set that narrows distinct errors. For SC3, no positive topology-specific global primacy experiment qualifies, so local threshold crossings do not lift its Γ ceiling.

Gamma hard-rule audit: Loop/contact enrichment alone does not prove regulatory direction. Reporter-only transfer to endogenous chromatin remains capped. Protein depletion changes TF binding and biochemical activity as well as topology. Three-hour maintenance does not answer de novo activation or all delayed outcomes.

SC1 cap: “Genome-wide association and colocalization without direct perturbation cap at Β.” Independent contact maps, fixed-cell tracing and live-cell controls reproducibly reveal dynamic loops, domains and compartments. Β reflects the noncausal existence formulation; physical formation mechanisms have direct perturbational support but do not transfer to transcriptional primacy.

SC3 cap: “Mechanistic plausibility plus in vitro reconstitution or simplified cellular support caps at Γ.” Short-term nascent transcription and many fine enhancer-promoter contacts persist after loop-extrusion factor loss; large endogenous edits are often buffered. Positive local and activation-context effects do not establish broad rate-limiting primacy. Protein chemistry, activation/maintenance timing and compartment modes prevent a global topology-only inference.

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: no. Independent contact maps, fixed-cell tracing and live-cell controls reproducibly reveal dynamic loops, domains and compartments. Β reflects the noncausal existence formulation; physical formation mechanisms have direct perturbational support but do not transfer to transcriptional primacy.

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. Human structural variants recreated in mice, boundary-preserving controls, CTCF motif inversions and enhancer-dependent directed globin activation converge on causal contribution at defined endogenous loci. They fail differently; separation-of-function LDB1 controls show that contacts also require competent biochemistry. Ζ applies to specific architectural contributions, not universal necessity or contact sufficiency.

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. Short-term nascent transcription and many fine enhancer-promoter contacts persist after loop-extrusion factor loss; large endogenous edits are often buffered. Positive local and activation-context effects do not establish broad rate-limiting primacy. Protein chemistry, activation/maintenance timing and compartment modes prevent a global topology-only inference.

### Upward threshold ladder

SC1 Δ: “Requires at least one endogenous perturbation showing the proposed feature contributes causally to the claimed output.” Satisfied: no. For a separate formation-mechanism claim, target each architectural mode with reversible endogenous perturbation and orthogonal structural measurement; existence is already well corroborated.

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: yes. 

SC2 Ζ: “Requires:
- Independent causal tests across loci or systems
- Specificity beyond global transcriptional collapse
- Narrowing of key alternatives” Satisfied: yes. 

SC2 Η: “Requires:
- Robust endogenous causality
- Reproducibility across loci/cell states within scope
- Strong evidence that the proposed mechanism is not a downstream correlate” Satisfied: no. Topology-specific endogenous loss/restoration with preserved factor binding, broader prespecified loci and lineages, and time-resolved functional output would extend reproducibility beyond scoped causal contribution.

SC3 Δ: “Requires at least one endogenous perturbation showing the proposed feature contributes causally to the claimed output.” Satisfied: no. Matched endogenous topology-only and biochemical-only perturbations in a preregistered representative locus panel during activation and maintenance, with viability, replication and nascent RNA controls plus independent rescue.

Upper ladder: Endogenous local edits, allele-resolved developmental variants and dose/recovery controls were considered. Their convergent set raises SC2 to Ζ; broad primacy SC3 still lacks representative topology-only necessity/sufficiency separated from protein function and reverse causality. No demand for an impossible clinical RCT is imposed.

Independence: SC2 combines distinct perturbation logic and functional phenotype classes; human genetics, recreated in vivo alleles, local motif geometry and directed rescue cover different weaknesses. They do not prove topology acts alone. Hi-C and Micro-C share ligation errors; repeated globin studies share tethering biology; imaging controls independently address permanent-loop interpretations. Convergence is credited to the bounded contribution claim, not re-capped over individual assay limitations.

Allele-resolved human variants with recreated mouse developmental alleles and boundary-preserving controls [54, 34]: Narrows patient association, species-only artifact and simple enhancer-distance explanations; large-edit regulatory content remains.

Native CTCF motif orientation and boundary edit tests [36, 7, 26]: Changes local topology and enhancer access without global protein collapse; altered DNA/protein geometry remains.

Directed enhancer-dependent globin reactivation and biochemical separation [23, 21]: LCR-deleted allele and looping-intact activation-deficient mutant discriminate generic recruitment and contact sufficiency; artificial tethering remains.

### Falsification and pitfalls

Loss of architectural features preserves much transcription. Hsieh three-hour nascent RNA, Rao 87% relatively stable active genes and Shh endogenous boundary edits (36471071,28985562,31511252). Additional downgrade: False.

Restoring contact alone fails activation. LDB1 DD4/5 mutant restores globin looping without promoter Pol II or transcription (24874989). Additional downgrade: False.

Proximity does not track contemporaneous enhancer-dependent bursts. Sox2 SCR deletion control versus null distance/burst and lag analysis; Shh activation can increase distance (31124784,31494034). Additional downgrade: False.

Population contact enrichment treated as permanent single-cell loops. Bintu, Fbn2 and Hsieh terminology checks separate probabilities, distances and dynamic domains.

Protein necessity treated as topology-specific necessity. CTCF promoter function and cohesin TF target search are explicit alternatives.

Reporter nonlinearity generalized to native genome primacy. Zuin neutral-TAD transgene and founder-map probabilities remain bounded.

Global transcriptional persistence treated as no regulatory function. Schwarzer gene/exogenic changes, Nora late changes and local human/mouse phenotypes retained.

Negative maintenance test generalized to all activation. Distant Shh activation and neuron gene-class dependence are separately scored.

Preprints or repeated globin assays counted as independent lines. ENCODE final replaces preprint; LDB1 reports share a platform; study groups logged.

### Adversarial steelman: above, then below

One rung above Γ is Δ: endogenous human/mouse boundary phenotypes, orientation edits and forced native-locus activation could be generalized to a substantial architectural contribution across loci.

One rung below Γ is Β: genome-wide contact-expression patterns and persistent transcripts could leave broad primacy as correlation, with positive protein perturbations explained entirely by biochemical effects.

Δ is rejected for broad primary SC3 because the context and topology-specificity of the positive causal tests do not match that scope. Β understates the mechanistic content supplied by native locus manipulations, controlled enhancer dependence and distance-dependent activation. Local SC2 independently receives Ζ, without substituting that success for broad primacy.

### Final score, causal direction and M/S/D

The preregistered scope-matched gate is SC3, yielding Γ. SC2 reaches Ζ through independent endogenous boundary edits, allele-resolved human/mouse developmental tests and locus-directed functional rescue, interpreted as architectural contribution rather than a sole switch. SC1 is an existence statement: Β records robust structural observation without pretending existence itself proves regulatory causality. Its empirical reality is well established and is not refuted by this causal ladder.

Step 1 does not classify all architecture as produced by transcription: local boundary function can precede output. Step 2 is exceeded by functional local perturbations. Step 3 fails broad necessity/sufficiency and rate-limiting primacy. Step 4 matches restricted necessity for enhancer access/insulation with competent biochemistry; this permissive classification is made before model ranking and applies to the bounded regulatory contribution.

Momentum: Mechanistic only. The named artifact is published mechanistic output: 2024 endogenous boundary dissection, 2025 LDB1 acute connectivity tests refining controls, and the 2026 ENCODE predictive benchmark broadening scope. None of it is a topology-only primacy test, which is what SC3's boundary check requires, and consistent with the Stability entry no such matched topology/biochemistry rescue panel was identified as underway. No live trial or promised outcome claimed.

Stability: Stable. No verified imminent result is identified that would specifically cross broad topology primacy. A matched topology/biochemical rescue panel could change the level.

Divergence: Contested; no single implied-level arithmetic, because no single field-implied level is defensible from conflicting framings: reviews and grant framing commonly present folding as a primary determinant of mammalian transcription, while the acute-depletion literature (36471071, 28985562, 29094699) is presented by its own authors as showing most expression maintained. These dimensions do not change level or confidence.

## PROPOSED DECISIVE EXPERIMENTS

Preregister representative endogenous loci across two mammalian lineages, proximal/distal enhancers and activation/maintenance. Cross acute topology-specific edits or separation alleles with biochemical-only defects, and independently restore architecture without restoring original cofactor surfaces.

Readout: Nascent transcription/burst kinetics, enhancer activity, direct factor occupancy, live distances/contact probabilities, cell cycle and viability during perturbation and recovery. Controls: Expression/binding-matched alleles, untagged drug control, promoter competence, replication-stress control, unchanged enhancer sequence, and timed activation history. Supporting: Topology-specific loss systematically changes preregistered output and orthogonal topology rescue restores it despite matched chemistry, establishing necessity and rate limitation within stated scope. Falsifying: Output persists or is rescued by biochemical competence without restored topology; effects occur only after general collapse or selected responder loci.

## RESEARCH TIMELINE

| Year | Milestone | Primary source | Interpretation |
|---|---|---|---|
| 2009 | Genome-wide Hi-C compartments | [PMID19815776](https://pubmed.ncbi.nlm.nih.gov/19815776/) | Structural map, not causal regulation. |
| 2012 | Mammalian topological domains | [PMID22495300](https://pubmed.ncbi.nlm.nih.gov/22495300/) | Reproducible population architecture. |
| 2012 | X-inactivation domains and boundary edit | [PMID22495304](https://pubmed.ncbi.nlm.nih.gov/22495304/) | Local functional disruption. |
| 2012 | Native globin directed recruitment | [PMID22682246](https://pubmed.ncbi.nlm.nih.gov/22682246/) | Enhancer-dependent activation. |
| 2014 | Looping-intact inactive LDB1 mutant | [PMID24874989](https://pubmed.ncbi.nlm.nih.gov/24874989/) | Contact insufficient without biochemistry. |
| 2014 | Deep in-situ contact map | [PMID25497547](https://pubmed.ncbi.nlm.nih.gov/25497547/) | Convergent motifs; correction body unaudited. |
| 2014 | Human globin reactivation | [PMID25126789](https://pubmed.ncbi.nlm.nih.gov/25126789/) | Culture context extension. |
| 2015 | Human variants and mouse boundaries | [PMID25959774](https://pubmed.ncbi.nlm.nih.gov/25959774/) | Functional pathology with boundary controls. |
| 2015 | CTCF motif inversion | [PMID26276636](https://pubmed.ncbi.nlm.nih.gov/26276636/) | Local orientation test. |
| 2016 | Forced-contact burst fractions | [PMID27067601](https://pubmed.ncbi.nlm.nih.gov/27067601/) | Shared globin platform. |
| 2016 | Patient-derived sickle cells | [PMID27405777](https://pubmed.ncbi.nlm.nih.gov/27405777/) | Ex vivo functional benefit. |
| 2017 | CTCF reversible insulation | [PMID28525758](https://pubmed.ncbi.nlm.nih.gov/28525758/) | Transcript recovery incomplete. |
| 2017 | RAD21 loss and recovery | [PMID28985562](https://pubmed.ncbi.nlm.nih.gov/28985562/) | Most output persists, minority changes. |
| 2017 | Adult-liver Nipbl removal | [PMID29094699](https://pubmed.ncbi.nlm.nih.gov/29094699/) | Modes separate; many gene changes remain. |
| 2018 | Single-cell chromatin tracing | [PMID30361340](https://pubmed.ncbi.nlm.nih.gov/30361340/) | Heterogeneous domain boundaries. |
| 2019 | Serial inversion/anchor rescue | [PMID30742094](https://pubmed.ncbi.nlm.nih.gov/30742094/) | Context-specific developmental causality. |
| 2019 | Sox2 live enhancer distance | [PMID31124784](https://pubmed.ncbi.nlm.nih.gov/31124784/) | Enhancer dependence without burst-distance correlation. |
| 2019 | Shh endogenous boundary robustness | [PMID31511252](https://pubmed.ncbi.nlm.nih.gov/31511252/) | Buffered locus counterexample. |
| 2019 | Mediator functional bridge | [PMID31402173](https://pubmed.ncbi.nlm.nih.gov/31402173/) | Activation/tethering separation. |
| 2019 | Enhancer CRISPRi benchmark | [PMID31784727](https://pubmed.ncbi.nlm.nih.gov/31784727/) | Enhancer activity plus contact prediction. |
| 2020 | Fine transcription-linked Micro-C | [PMID32213323](https://pubmed.ncbi.nlm.nih.gov/32213323/) | Reverse causal contribution. |
| 2020 | Genome-scale imaging | [PMID32822575](https://pubmed.ncbi.nlm.nih.gov/32822575/) | Same-cell structural/transcript associations. |
| 2021 | Human globin boundary deletion | [PMID34585664](https://pubmed.ncbi.nlm.nih.gov/34585664/) | Endogenous erythroid activation. |
| 2021 | Promoter CTCF rescue | [PMID33398174](https://pubmed.ncbi.nlm.nih.gov/33398174/) | Specific distal regulation. |
| 2022 | Reporter contact nonlinearity | [PMID35418676](https://pubmed.ncbi.nlm.nih.gov/35418676/) | Engineered locus and inferred burst model. |
| 2022 | Live Fbn2 loop dynamics | [PMID35420890](https://pubmed.ncbi.nlm.nih.gov/35420890/) | Rare dynamic full loops. |
| 2022 | Distant Shh activation need | [PMID36097291](https://pubmed.ncbi.nlm.nih.gov/36097291/) | Cohesin context and distance. |
| 2022 | Acute factor/nascent RNA tests | [PMID36471071](https://pubmed.ncbi.nlm.nih.gov/36471071/) | Three-hour maintenance largely persists. |
| 2023 | Nested microcompartments | [PMID37157000](https://pubmed.ncbi.nlm.nih.gov/37157000/) | Many persist without extrusion. |
| 2024 | GIST boundary dissection | [PMID38452764](https://pubmed.ncbi.nlm.nih.gov/38452764/) | Local enhancer-oncogene contribution. |
| 2025 | Acute LDB1 networks | [PMID39721581](https://pubmed.ncbi.nlm.nih.gov/39721581/) | Lineage-specific multienhancer organization. |
| 2026 | Final ENCODE-rE2G resource | [PMID42457959](https://pubmed.ncbi.nlm.nih.gov/42457959/) | Broader benchmark; preprint counted once. |

## KNOWLEDGE GAPS

Topology-only perturbation and orthogonal rescue preserving factor biochemistry.

Representative prespecified loci and lineages rather than outcome-selected responsive loci.

Matched activation-versus-maintenance histories and longer recovery with nascent output.

Same-cell topology, factor binding and transcription at sufficient temporal/spatial resolution.

Discrimination of stable boundary loops, transient encounters and microcompartments.

Human allele-resolved functional effects beyond selected developmental and globin loci.

Quantitative reconciliation of contact probability, 3D distance and nonlinear promoter memory.

Original supplements and unresolved Rao 2014 correction-body audit; access boundaries retained.

## 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. Provider statements about Methods/Results and any returned passages were compared with original-paper passages where available; failed retrievals, source substitutions and unverified aspects are recorded in the case reconciliation. Successful original-passage comparisons are distinguished from provider summaries and assertions of access. 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

60 unique counted primary reports with eleven selected original partial-body examinations; all abstract/status records examined. ENCODE final 42457959 replaces preprint 38014075; archived preprint presentation is outside counted set. SC1 Β is a causal-ladder characterization of an existence formulation, not doubt about reproducible features. Consensus 2 Pro / 0 Deep / 0 API, SciSpace original leads resolved and duplicated preprints/reviews excluded. Cutoff 2026-10-08; examination UTC 2026-10-09. Unblinded coordinator review, not exhaustive systematic or complete-paper review.

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. This is the revised edition carrying the 9 October 2026 Consensus provenance supplement; it was reviewed as it now stands.

**Scope of checks.** Reference PMIDs verified against PubMed metadata: 60/60 resolve to the stated first author, title, journal and year. Retraction and expression-of-concern screen: none found; one parent record carries an erratum with no PMID in the metadata, recorded as a status flag. Load-bearing claims spot-checked against the primary records: 11, chosen as the ones the Gamma-versus-Delta decision turns on. Scoring logic re-derived against the framework reference and SKILL.md, with particular attention to the scope-matched aggregation rule and to the universal caps. Internal consistency checked between AT A GLANCE, the subclaim matrix, the final-score block and the score card (60 sources, 64 claims, Gamma with Moderate confidence, canonical descriptor, permissive factor). The revised edition was also compared line by line against the earlier edition: the only difference is the inserted provenance block, so no regression was introduced by the revision.

**Attribution audit.** Every checked claim matched its source, including several where a looser reading would have inverted the meaning: cohesin degradation eliminates all loop domains while leaving compartment domains and histone marks intact and affecting a minority of active genes, with many megabase loops re-forming within an hour (PMID 28985562); CTCF depletion removes TAD insulation while active and inactive compartments stay segregated, and restoring CTCF reinstates architecture — which the review pairs with the fact that transcriptome recovery is incomplete (PMID 28525758); enhancer-promoter interactions and transcription are largely maintained after three-hour depletion of CTCF, cohesin or WAPL, with cohesin loss instead reducing transcription-factor binding (PMID 36471071); Nipbl deletion makes TADs vanish globally "even in the absence of transcriptional changes" while compartments are reinforced (PMID 29094699); the Fbn2 looped fraction is approximately 3 to 6.5% with a median lifetime of approximately 10 to 30 minutes (PMID 35420890); cohesin, but not CTCF, is required for distant-enhancer activation of Shh and is dispensable at the promoter and for a proximal enhancer (PMID 36097291); limb-malformation rewiring occurs only when the variant disrupts a CTCF-associated boundary (PMID 25959774); the LDB1 DD4/5 subdomain is dispensable for looping but essential for activation and for FOG1 and NuRD recruitment (PMID 24874989); the enhancer-position assay establishes a nonlinear contact-to-output relation in a deliberately simplified genomic region (PMID 35418676); Sox2 transcription shows no association with enhancer proximity (PMID 31124784); and the ENCODE resource names promoter class and enhancer-enhancer synergy as features beyond three-dimensional contact (PMID 42457959). No citation inversion was found, and the review's refusal to read any of these as a global topological switch is faithful to the sources.

| ID | Severity | Location | Original to corrected | Evidence |
|---|---|---|---|---|
| AR-1 | Major | AT A GLANCE table; "Final score, causal direction and M/S/D"; score card momentum block | Momentum "Decisive work underway" corrected to "Mechanistic only"; artifact rewritten | The framework defines "Decisive work underway" as someone running an experiment that could cross the next threshold. The artifact itself states that the named work "broadens scope without a topology-only primacy test" and that no live trial is claimed, and the Stability entry states that no imminent result specifically crossing broad topology primacy was identified. By the framework's own table that is "Mechanistic only": active mechanistic work, nothing addressing the boundary check. Momentum modifies no letter; the level, confidence and role are unchanged. |
| AR-2 | Minor | "Final score, causal direction and M/S/D", Divergence line; score card divergence justification | Divergence given the artifact the framework requires, naming the two conflicting framings | Divergence requires a checkable artifact. "Contested" legitimately has no implied level and no arithmetic, but both prose and score card asserted only the absence of one. Value unchanged at Contested. |
| AR-3 | Minor | Evidence card [42]; two score-card ledger rows | "ErratumIn: PMIDnot supplied" corrected to "ErratumIn: PMID not supplied" | Reference-builder rendering defect fusing the label to the following word. The flag's content is correct — PubMed supplies no PMID for the erratum on PMID 25497547 — and the card already says so in its "Does not show" line. |
| AR-4 | Editorial | Final-score block, Nipbl paragraph, methods and provenance lines | Eleven fused tokens separated: "Rao2014", "Step1" to "Step4", "day1", "day4", "Cutoff2026-10-08", "examinationUTC2026-10-09", "Consensus2Pro/0Deep/0API" | The known "randomize3808" rendering class, present here only in isolated places rather than throughout. Gene, protein and complex names (CTCF, RAD21, PDS5, PRC1, PRC2, YY1, LDB1, DD4/5, HUDEP2, ZNF143, FGF3, HS1), DOIs and PMIDs were left untouched. |
| AR-5 | Major | Consensus provenance reconciliation block; `consensus-addendum.md` | "The earlier adversarial approval refers to its original edition" corrected to "No earlier adversarial approval is attached to this case; the 2026-10-06 adversarial pass did not cover it" | False provenance inserted unconditionally by the 9 October revision script. Verified against the corpus: 56 review files carry a 2026-10-06 approval banner and this case is not among them, and the earlier edition at `hsef_v53_popularity_ranks_41_45_2026-10-08/` carries no approval section. Asserting a prior approval that does not exist is a provenance error of the kind the citation ledger exists to prevent. |
| AR-6 | Minor | Score card `final_score.confidence_rationale` | "density, heterogeneous controls and incomplete access set the confidence, not correctness" corrected to "evidence density, independent replication and heterogeneity of controls set the confidence; access depth and belief in correctness do not" | The framework states that confidence "reflects evidence density and reproducibility" and lists what it does not reflect; the score card's boilerplate rationale named "incomplete access" as one of the things that "set the confidence". Access depth is a statement about the reviewer, not about the evidence, so it cannot be a determinant of the band. The rationale now rests on density, independent replication and heterogeneity of controls. The band itself was re-tested against both the Moderate and the High text and is unchanged. |

**Rejected findings (checked, no change).**

1. **The level, and the aggregation rule.** This is the place where a scope-matched rule is most often misread, and the review applies it correctly: the rule takes the highest subclaim whose scope matches the central claim's scope, the central claim is broad primacy across mammalian loci, the matching subclaim is SC3 at Gamma, and SC2's Zeta is explicitly reported as the narrower locus-specific result rather than promoted to the headline. Delta for the broad claim was argued and rejected because the positive causal tests are locus- and topology-specific and do not match the broad scope; Beta was rejected because native locus edits, controlled enhancer dependence and distance-dependent activation supply real mechanistic content. Gamma with Moderate confidence stands.
2. **The validator's claim-form warning.** The score card records `entry_form` as "phenomenon" and the validator warns accordingly. Rejected per the standing convention: the registered restatement is a declarative causal proposition naming both the mechanism and its consequence, which is what Step 0 requires, and SC1 is separately and explicitly held open as an existence statement whose empirical reality the Beta entry does not dispute. Grading the folding phenomenon itself as refuted would be the damaging error the framework warns about, and this review takes care not to make it.
3. **Citation years and PubMed title fields.** References [1] and [46] print a year one later than the PubMed e-pub year, and the PubMed title fields for references [29] and [60] have dropped the italicised gene names *Shh* and *Sox2* that the review's reference list correctly carries. Both rejected per the standing conventions.
4. **Collective-author defect, empty DOI fields, retrieval handles.** Screened for; none present.
5. **Independence basis for SC2's Zeta.** Checked against the shared-failure test. The three lines named are endogenous boundary editing, allele-resolved human and mouse developmental genetics, and locus-directed functional rescue; a single systematic error could not produce all three, and the review separately declines to count the repeated globin tethering reports as independent lines. No change.
6. **The confidence band, Moderate versus High.** The lead reported that some reviews in this corpus justify a Moderate band from the reviewer's access depth, and that one sibling case has been corrected to High on that basis. That test was applied here and the band was left at Moderate, with the rationale wording corrected under AR-6. The case for High is real: the results this Gamma rests on, structure collapsing while most expression is maintained, are reproduced by at least four groups in four systems across Hi-C, Micro-C, imaging and degron modalities, which reads onto "extensive independent replication across labs, models, and assay modalities". The case for Moderate is that the review's own text records the assay-level and heterogeneity concerns the framework's Moderate text names: indirect effects accumulating by day 4, incomplete transcriptome recovery after washout, residual CTCF binding at some boundaries, and reporter rather than endogenous measurement of the contact-output relation. Both bands are defensible on the framework text, so the framework does not force a change and the author's call stands. The lead has since adjudicated this question and confirmed the call, setting a two-step test for the corpus: access depth is struck as a determinant everywhere, and the band is then re-derived from what remains, rising only where access depth was the sole reason holding it down. Here the reservations the review records in its own text — day-4 indirect effects, incomplete transcriptome recovery after washout, residual CTCF binding at some boundaries, and reporter rather than endogenous measurement of the contact-output relation — are valid determinants, so Moderate stands.
7. **Revision regression.** None. The revised edition differs from the earlier one only by the provenance block, which changes no claim, grade or count. The specific regression reported elsewhere in this round — a spliced Consensus-consistency block contradicting a preserved sentence that denied any Consensus work — was checked for here and is absent: the preserved METHODS AND CONSENSUS CONTRIBUTION section already states that Consensus was used through the signed-in browser, and REVIEWER NOTES already records "Consensus 2 Pro / 0 Deep / 0 API", both consistent with the inserted provenance block.

**Residual limitations.** Two corrections in this pass (AR-5, AR-6) came from systematic artifacts reported by the lead mid-pass and were applied after the first four. Several figures the review quotes — the transcript counts after three-hour depletion, Rao's 87% under a 30% change criterion, Nora's 18% residual boundaries and the 370-to-4,996 gene progression, the Nipbl counts of 637 down, 487 up and 1,107 increased exogenic regions, and the ENCODE counts of 92 million predicted links and 10,356 benchmark pairs — sit in Methods and Results text rather than abstracts, so this pass could confirm them only against the review's own partial-body receipts. Access depth is unchanged at 11 partial-body and 49 complete abstract or status examinations. The shipped validator is version 2.4 and enforces the v5.4 lay-summary requirement; this is a v5.3 package, so it returns one FAIL, the missing lay summary, both before and after this pass, and no lay summary was fabricated to clear it.

**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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49. Goel VY, Huseyin MK, Hansen AS. Region Capture Micro-C reveals coalescence of enhancers and promoters into nested microcompartments. Nature genetics. 2023. [PMID 37157000](https://pubmed.ncbi.nlm.nih.gov/37157000/). DOI: 10.1038/s41588-023-01391-1. Access: abstract_metadata. Study: PMID37157000.

50. Zheng M, Tian SZ, Capurso D et al. Multiplex chromatin interactions with single-molecule precision. Nature. 2019. [PMID 30778195](https://pubmed.ncbi.nlm.nih.gov/30778195/). DOI: 10.1038/s41586-019-0949-1. Access: abstract_metadata. Study: PMID30778195.

51. Kraft K, Yost KE, Murphy SE et al. Polycomb-mediated genome architecture enables long-range spreading of H3K27 methylation. Proceedings of the National Academy of Sciences of the United States of America. 2022. [PMID 35617427](https://pubmed.ncbi.nlm.nih.gov/35617427/). DOI: 10.1073/pnas.2201883119. Access: abstract_metadata. Study: PMID35617427.

52. Dileep V, Wilson KA, Marchal C et al. Rapid Irreversible Transcriptional Reprogramming in Human Stem Cells Accompanied by Discordance between Replication Timing and Chromatin Compartment. Stem cell reports. 2019. [PMID 31231024](https://pubmed.ncbi.nlm.nih.gov/31231024/). DOI: 10.1016/j.stemcr.2019.05.021. Access: abstract_metadata. Study: PMID31231024.

53. Zhang M, Huang H, Li J et al. ZNF143 deletion alters enhancer/promoter looping and CTCF/cohesin geometry. Cell reports. 2024. [PMID 38206813](https://pubmed.ncbi.nlm.nih.gov/38206813/). DOI: 10.1016/j.celrep.2023.113663. Access: abstract_metadata. Study: PMID38206813.

54. Lupiáñez DG, Kraft K, Heinrich V et al. Disruptions of topological chromatin domains cause pathogenic rewiring of gene-enhancer interactions. Cell. 2015. [PMID 25959774](https://pubmed.ncbi.nlm.nih.gov/25959774/). DOI: 10.1016/j.cell.2015.04.004. Access: full_text_partial. Study: PMID25959774.

55. Hyle J, Zhang Y, Wright S et al. Acute depletion of CTCF directly affects MYC regulation through loss of enhancer-promoter looping. Nucleic acids research. 2019. [PMID 31127282](https://pubmed.ncbi.nlm.nih.gov/31127282/). DOI: 10.1093/nar/gkz462. Access: abstract_metadata. Study: PMID31127282.

56. Zhang H, Emerson DJ, Gilgenast TG et al. Chromatin structure dynamics during the mitosis-to-G1 phase transition. Nature. 2019. [PMID 31776509](https://pubmed.ncbi.nlm.nih.gov/31776509/). DOI: 10.1038/s41586-019-1778-y. Access: abstract_metadata. Study: PMID31776509.

57. Nora EP, Lajoie BR, Schulz EG et al. Spatial partitioning of the regulatory landscape of the X-inactivation centre. Nature. 2012. [PMID 22495304](https://pubmed.ncbi.nlm.nih.gov/22495304/). DOI: 10.1038/nature11049. Access: abstract_metadata. Study: PMID22495304.

58. Schwarzer W, Abdennur N, Goloborodko A et al. Two independent modes of chromatin organization revealed by cohesin removal. Nature. 2017. [PMID 29094699](https://pubmed.ncbi.nlm.nih.gov/29094699/). DOI: 10.1038/nature24281. Access: full_text_partial. Study: PMID29094699.

59. Willemin A, Lopez-Delisle L, Bolt CC et al. Induction of a chromatin boundary in vivo upon insertion of a TAD border. PLoS genetics. 2021. [PMID 34292939](https://pubmed.ncbi.nlm.nih.gov/34292939/). DOI: 10.1371/journal.pgen.1009691. Access: abstract_metadata. Study: PMID34292939.

60. Alexander JM, Guan J, Li B et al. Live-cell imaging reveals enhancer-dependent Sox2 transcription in the absence of enhancer proximity. eLife. 2019. [PMID 31124784](https://pubmed.ncbi.nlm.nih.gov/31124784/). DOI: 10.7554/eLife.41769. Access: full_text_partial. Study: PMID31124784.

## Source-specific evidence cards

### [1] LDB1 establishes multi-enhancer networks to regulate gene expression.

**Shows:** Acute LDB1 loss and engineered recruitment alter multi-enhancer networks; many connections persist without CTCF/cohesin/YY1.

**Does not show:** LDB1 transcriptional biochemistry and contact changes are intertwined; one lineage does not establish genome-wide primacy. Updates preprint 39229045.

**Access/status:** Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. UpdateOf: PMID39229045. Subclaims: SC1, SC2, SC3.

### [2] Cohesin is required for long-range enhancer action at the Shh locus.

**Shows:** Cohesin is required for synthetic activation from distant Shh enhancers, while promoter and proximal activation remain independent.

**Does not show:** Artificial activation and acute protein loss do not isolate topology from all protein functions; distance and context constrain necessity.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph7, 1:Results:paragraph10, 1:Results:paragraph12, 1:Results:paragraph15. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

### [3] Enhancer-promoter interactions and transcription are largely maintained upon acute loss of CTCF, cohesin, WAPL or YY1.

**Shows:** Most enhancer-promoter interactions and nascent transcription remain after three-hour CTCF/cohesin/WAPL/YY1 depletion.

**Does not show:** Short-term maintenance is tested; activation and later effects remain open. Cohesin affects transcription-factor binding.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph8, 1:Results:paragraph17, 1:Results:paragraph20, 1:Results:paragraph25, 1:Results:paragraph31, 1:Results:paragraph47, 3:Methods:paragraph0, 3:Methods:paragraph39. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

### [4] Cohesin promotes stochastic domain intermingling to ensure proper regulation of boundary-proximal genes.

**Shows:** Imaging shows stochastic domain intermingling; cohesin loss reduces contacts, whereas CTCF/WAPL loss increases cohesin-dependent mixing and alters boundary-proximal bursting.

**Does not show:** Population TAD loss does not imply increased single-cell ectopic contact; protein depletion has biochemical effects.

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

### [5] Targeted Degradation of CTCF Decouples Local Insulation of Chromosome Domains from Genomic Compartmentalization.

**Shows:** Dose-dependent CTCF depletion and restoration change domain insulation; compartments persist and nondividing cells need CTCF for insulation.

**Does not show:** Physical insulation recovers but most expression changes do not fully reset after washout; early downregulated promoters show direct CTCF binding. Late viability and direct protein functions constrain topology attribution.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph2, 1:Results:paragraph7, 1:Results:paragraph10, 1:Results:paragraph14, 1:Results:paragraph15, 1:Results:paragraph18. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

### [6] CTCF mediates dosage- and sequence-context-dependent transcriptional insulation by forming local chromatin domains.

**Shows:** Tandem CTCF sites and sequence context provide insulation and weaken local contacts.

**Does not show:** Reporter insulation and DNA/protein binding effects cannot establish endogenous transcriptional primacy.

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

### [7] 3'HS1 CTCF binding site in human β-globin locus regulates fetal hemoglobin expression.

**Shows:** Deleting the beta-globin 3-prime HS1 boundary activates fetal haemoglobin through an ectopic distal enhancer; inversion insulates.

**Does not show:** Endogenous locus evidence; motif orientation and protein recruitment are linked. No patient clinical outcome or broad primacy test.

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

### [8] Dynamic CTCF binding directly mediates interactions among cis-regulatory elements essential for hematopoiesis.

**Shows:** Lineage-specific CTCF binding and motif deletion at RBM38 alter enhancer interaction and erythropoiesis.

**Does not show:** One endogenous locus and regulatory DNA edit; topology-only attribution and exact scope need controls.

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

### [9] Acute depletion of CTCF rewires genome-wide chromatin accessibility.

**Shows:** Acute CTCF loss alters accessibility near binding sites and selected gene output without a large global transcriptional change.

**Does not show:** Accessibility, CTCF partners and contact changes cannot by themselves separate direct biochemical regulation from topology.

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

### [10] Cohesin-dependence of neuronal gene expression relates to chromatin loop length.

**Shows:** Immediate-early activation and short Fos contacts persist without cohesin; longer-loop secondary response and synapse genes show greater dependence.

**Does not show:** Dependence is gene-class and distance specific; chronic developmental and direct protein effects remain alternative causes.

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

### [11] Temporal analysis suggests a reciprocal relationship between 3D chromatin structure and transcription.

**Shows:** Eight-timepoint maps associate enhancer acetylation, expression and loop changes with reciprocal timing.

**Does not show:** Temporal associations do not isolate causality; transcription itself can impede loops.

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

### [12] Increased enhancer-promoter interactions during developmental enhancer activation in mammals.

**Shows:** Nearly a thousand developmental enhancers show moderate tissue-specific increases in contacts; stable contacts can persist without enhancer.

**Does not show:** Activity-contact correlation and enhancer absence do not demonstrate broad topology necessity.

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

### [13] Nonlinear control of transcription through enhancer-promoter interactions.

**Shows:** Dense enhancer repositioning reveals nonlinear relationships between contact probability, enhancer strength and promoter output.

**Does not show:** Engineered eGFP/Sox2-SCR transgene in a neutral TAD with internal CTCF sites removed; founder contact maps infer probabilities. Nonlinear model fit is not direct observation of momentary endogenous contact-to-burst causality.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Enhancer action depends on genomic distance:paragraph0, 1:Enhancer action depends on genomic distance:paragraph2, 1:Enhancer action depends on genomic distance:paragraph3, 1:Enhancer action depends on genomic distance:paragraph4, 2:Enhancer contacts modulate burst frequency:paragraph0, 2:Enhancer contacts modulate burst frequency:paragraph2. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

### [14] Promoter-proximal CTCF binding promotes distal enhancer-dependent gene activation.

**Shows:** Promoter CTCF binding loss decreases selected distant contacts and expression; tethered CTCF restores both.

**Does not show:** CTCF tethering restores biochemical activities too; adult-tissue breadth is correlational.

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

### [15] Enhancer-promoter interactions become more instructive in the transition from cell-fate specification to tissue differentiation.

**Shows:** Enhancer-promoter topology is permissive at specification and better correlates with activity during terminal differentiation.

**Does not show:** Outside registered mammalian scope; contact/activity observations do not prove necessity.

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

### [16] BET inhibition disrupts transcription but retains enhancer-promoter contact.

**Shows:** BET inhibition and BRD4 loss reduce transcription while enhancer-promoter contacts persist.

**Does not show:** Protein and solvent interventions are not phase-state specific; contact persistence need not exclude transient interactions.

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

### [17] Decreased Enhancer-Promoter Proximity Accompanying Enhancer Activation.

**Shows:** Shh activation accompanies decreased spatial enhancer proximity; synthetic activation reproduces it with PARP dependence.

**Does not show:** One locus; fixed-cell distance and ligation contact differ; contact events below resolution may remain.

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

### [18] Single-gene imaging links genome topology, promoter-enhancer communication and transcription control.

**Shows:** Live imaging resolves regulatory-factor clustering and frequent enhancer-gene proximity within nanoenvironments.

**Does not show:** Physical proximity and recruitment do not isolate topology as the initiating causal variable.

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

### [19] Co-depletion of NIPBL and WAPL balance cohesin activity to correct gene misexpression.

**Shows:** NIPBL or WAPL depletion each misregulates roughly two thousand genes; co-depletion restores most misexpression.

**Does not show:** Compensatory protein perturbation supports cohesin balance but cannot exclude non-topological biochemical functions.

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

### [20] LDB1-mediated enhancer looping can be established independent of mediator and cohesin.

**Shows:** TATA deletion preserves looping despite transcription loss; activation-deficient LDB1 restores contact without Mediator/cohesin.

**Does not show:** Looping sufficiency is explicitly limited; linked biochemical functions require separation.

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

### [21] Role of LDB1 in the transition from chromatin looping to transcription activation.

**Shows:** LDB1 DD4/5 mutant preserves dimerization and looping but lacks transcriptional activation and coregulator recruitment.

**Does not show:** Matched separation at one locus constrains a loop-only explanation; mutation has identified biochemical consequences.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 0:Results:paragraph9, 0:Results:paragraph12, 0:Results:paragraph14, 0:Results:paragraph24. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

### [22] Enhancer Regulation of Transcriptional Bursting Parameters Revealed by Forced Chromatin Looping.

**Shows:** Forced globin contact increases burst fraction, with little burst-size effect.

**Does not show:** Related LDB1 platform and locus; forced protein recruitment is not topology-only manipulation.

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

### [23] Controlling long-range genomic interactions at a native locus by targeted tethering of a looping factor.

**Shows:** LDB1 tethering reactivates native beta-globin, requiring the distant LCR.

**Does not show:** Artificial tethering in a deficient background can restore cofactor functions; locus requirement cannot establish universal primacy.

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

### [24] Reactivation of developmentally silenced globin genes by forced chromatin looping.

**Shows:** Forced LDB1 recruitment reactivates developmentally silenced globins and changes LCR contacts.

**Does not show:** Same tethering family; high output in culture is not clinical efficacy or general topology sufficiency.

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

### [25] Forced chromatin looping raises fetal hemoglobin in adult sickle cells to higher levels than pharmacologic inducers.

**Shows:** ZF-LDB1 raises fetal haemoglobin and reduces hypoxic sickling compared with selected drug regimens.

**Does not show:** Ex vivo gene delivery; related globin programme; in vivo safety and broad transcriptional role untested.

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

### [26] Dissection of a CTCF topological boundary uncovers principles of enhancer-oncogene regulation.

**Shows:** Four CTCF motif disruptions fuse domains and increase ANO1-enhancer contact with FGF3 and FGF3 induction.

**Does not show:** Regulatory DNA/protein changes accompany topology; tumour association differs from autonomous initiation.

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

### [27] Resolving the 3D Landscape of Transcription-Linked Mammalian Chromatin Folding.

**Shows:** Micro-C resolves fine enhancer/promoter structures; acute transcription inhibition disrupts fine features but not higher architecture.

**Does not show:** Intervention supports reverse causality as well as coupling; drugs are pleiotropic.

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

### [28] Cohesin Disrupts Polycomb-Dependent Chromosome Interactions in Embryonic Stem Cells.

**Shows:** Cohesin loss removes TADs while PRC1-dependent contacts persist or strengthen and repression changes.

**Does not show:** Distinct architectural modes and direct PRC1 biochemical repression prevent universal loop-extrusion attribution.

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

### [29] Developmentally regulated Shh expression is robust to TAD perturbations.

**Shows:** Multiple Shh TAD/boundary edits leave expression and phenotype largely intact; one larger deletion affects neighboring Mnx1.

**Does not show:** Endogenous negative test; buffering, locus choice and larger-edit regulatory content limit generalization.

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

### [30] Dynamics of CTCF- and cohesin-mediated chromatin looping revealed by live-cell imaging.

**Shows:** Fbn2 boundary loops are rare and dynamic, with roughly 3–6.5 percent occupancy and 10–30-minute lifetimes.

**Does not show:** One locus and Bayesian state inference; population loops do not mean permanent structures in every cell.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Main text:paragraph3, 1:Main text:paragraph9, 1:Main text:paragraph12. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC3.

### [31] Super-resolution chromatin tracing reveals domains and cooperative interactions in single cells.

**Shows:** Chromatin tracing detects heterogeneous TAD-like conformations; cohesin loss removes preferred boundary positions but not single-cell domains.

**Does not show:** Population-domain loss differs from absence of local conformations; fixed imaging is not transcriptional causal proof.

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

### [32] Topologically associating domains and chromatin loops depend on cohesin and are regulated by CTCF, WAPL, and PDS5 proteins.

**Shows:** Cohesin, CTCF, WAPL and PDS5 perturbations change domains, boundaries and loop lengths differently.

**Does not show:** Protein effects establish structural control, not necessarily broad transcriptional initiation.

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

### [33] Highly rearranged chromosomes reveal uncoupling between genome topology and gene expression.

**Shows:** Allele-specific balancer rearrangements disrupt many contacts while most expression remains stable.

**Does not show:** Outside mammalian scope; developmental compensation and complex rearrangements remain.

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

### [34] Serial genomic inversions induce tissue-specific architectural stripes, gene misexpression and congenital malformations.

**Shows:** Serial inversions create tissue-specific stripes, ectopic transcription and malformations; anchor deletion rescues phenotype.

**Does not show:** Endogenous functional test with rescue; selected enhancer-rich landscape and regulatory-sequence effects limit breadth.

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

### [35] Interplay between CTCF boundaries and a super enhancer controls cohesin extrusion trajectories and gene expression.

**Shows:** Allelic boundary edits at Prdm14 change extrusion trajectories; activation can cross a prominent boundary and need not require paused looping.

**Does not show:** Context-specific endogenous edits separate simplistic boundary loops; enhancer activity contributes to architecture.

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

### [36] CRISPR Inversion of CTCF Sites Alters Genome Topology and Enhancer/Promoter Function.

**Shows:** CTCF motif inversion reconfigures contacts and enhancer/promoter expression specificity.

**Does not show:** Local motif orientation preserves some sequence content but changes protein geometry; limited loci.

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

### [37] Inversion of a topological domain leads to restricted changes in its gene expression and affects interdomain communication.

**Shows:** Large TAD inversion changes contacts with limited local expression effects, yet alters neighboring Xist.

**Does not show:** Strong negative and positive locus contrast; changes in regulatory sequence position prevent topology-only inference.

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

### [38] Distinct Classes of Chromatin Loops Revealed by Deletion of an RNA-Binding Region in CTCF.

**Shows:** CTCF RNA-binding-region loss disrupts roughly half the loops and selected expression with impaired clustering/binding.

**Does not show:** Mutation changes RNA interactions and DNA occupancy, so direct biochemical causes remain.

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

### [39] Activity-by-contact model of enhancer-promoter regulation from thousands of CRISPR perturbations.

**Shows:** Thousands of enhancer perturbations support activity-by-contact prediction of gene links.

**Does not show:** Perturbed enhancer activity, not contact alone; prediction accuracy is not a necessity test of topology.

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

### [40] An encyclopedia of human enhancer-gene regulatory interactions.

**Shows:** Final 2026 publication integrates over 92 million predicted links across 1,458 biosamples, with 10,356 perturbed pairs; promoter class and synergy contribute beyond contact.

**Does not show:** Predicted links are not all experimentally tested. Updates preprint 38014075, counted once; enhancer interventions do not isolate topology.

**Access/status:** Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. UpdateOf: PMID38014075. Subclaims: SC2, SC3.

### [41] Comprehensive mapping of long-range interactions reveals folding principles of the human genome.

**Shows:** Hi-C establishes genome-wide compartment and chromosome-territory contact patterns.

**Does not show:** Population proximity ligation and polymer modelling do not prove individual permanent loops or transcriptional causality.

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

### [42] A 3D map of the human genome at kilobase resolution reveals principles of chromatin looping.

**Shows:** Deep in-situ Hi-C maps domains, compartments and roughly ten thousand loops with convergent CTCF enrichment.

**Does not show:** Association with activation; linked ErratumIn lacks PMID in metadata and body has not been audited.

**Access/status:** Complete primary abstract and linked-status metadata examined. No complete-paper or supplement audit claimed. ErratumIn: PMID not supplied. Subclaims: SC1.

### [43] Cohesin Loss Eliminates All Loop Domains.

**Shows:** Acute cohesin loss removes loop domains while compartments remain; restoration rapidly rebuilds loops, and only a minority of active genes changes.

**Does not show:** Short-term gene output and protein pleiotropy; physical-loop necessity does not establish broad transcriptional necessity.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:RESULTS:paragraph0, 1:RESULTS:paragraph5, 1:RESULTS:paragraph24, 1:RESULTS:paragraph25. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

### [44] Topological domains in mammalian genomes identified by analysis of chromatin interactions.

**Shows:** Hi-C identifies conserved topological domains and enriched boundary factors.

**Does not show:** Bulk structural association lacks isolated functional perturbation.

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

### [45] Allelic reprogramming of 3D chromatin architecture during early mammalian development.

**Shows:** Low-input Hi-C shows slow postfertilization domain/compartment maturation and compaction partly without zygotic transcription.

**Does not show:** Developmental staging and transcription inhibition do not independently manipulate every architecture mode.

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

### [46] Cohesin and CTCF differentially affect chromatin architecture and gene expression in human cells.

**Shows:** CTCF and cohesin depletion have distinct effects on domain contacts and gene groups.

**Does not show:** Earlier partial depletion and mixed direct functions differ from acute complete architectural loss.

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

### [47] A Pliable Mediator Acts as a Functional Rather Than an Architectural Bridge between Promoters and Enhancers.

**Shows:** Mediator core is required for Pol II recruitment but Mediator/Pol II are dispensable for regulatory DNA tethering.

**Does not show:** Direct protein-function separation supports functional compatibility rather than contact sufficiency.

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

### [48] Genome-Scale Imaging of the 3D Organization and Transcriptional Activity of Chromatin.

**Shows:** Genome-scale imaging pairs more than a thousand loci and nascent transcripts with nuclear landmarks.

**Does not show:** Simultaneous native-context observation is not intervention-driven causality.

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

### [49] Region Capture Micro-C reveals coalescence of enhancers and promoters into nested microcompartments.

**Shows:** Deep capture Micro-C detects nested microcompartments; many persist after extrusion loss or transcription inhibition.

**Does not show:** Contact compartmentalization is an alternative mode; partial drug effects and selected captured regions limit broad proof.

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

### [50] Multiplex chromatin interactions with single-molecule precision.

**Shows:** ChIA-Drop resolves heterogeneous multivalent contacts at single-molecule precision.

**Does not show:** Outside mammalian scope; native multiway contact does not specify transcriptional causal direction.

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

### [51] Polycomb-mediated genome architecture enables long-range spreading of H3K27 methylation.

**Shows:** Polycomb anchor deletions alter remote H3K27me3 and embryonic partner-gene repression.

**Does not show:** Anchor DNA and PRC2 biochemical changes accompany contact loss; long-range topology-only necessity is unresolved.

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

### [52] Rapid Irreversible Transcriptional Reprogramming in Human Stem Cells Accompanied by Discordance between Replication Timing and Chromatin Compartment.

**Shows:** Transcription reprograms within a cell cycle while replication timing and compartments remain temporarily discordant.

**Does not show:** Temporal discordance constrains synchronous primacy but does not prove causal independence.

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

### [53] ZNF143 deletion alters enhancer/promoter looping and CTCF/cohesin geometry.

**Shows:** ZNF143 loss changes enhancer/promoter loops and CTCF/cohesin geometry.

**Does not show:** Transcription-factor DNA recognition and promoter activities confound topology-only attribution.

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

### [54] Disruptions of topological chromatin domains cause pathogenic rewiring of gene-enhancer interactions.

**Shows:** Human structural variants and recreated mouse alleles rewire enhancer access and developmental expression when boundaries are disrupted.

**Does not show:** Boundary-preserving shorter deletions retain normal limbs/expression, narrowing distance-only explanation; regulatory-content changes and selected developmental landscape still limit generalization.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:RESULTS:paragraph15. No complete-paper or supplement audit claimed. none_found. Subclaims: SC2, SC3.

### [55] Acute depletion of CTCF directly affects MYC regulation through loss of enhancer-promoter looping.

**Shows:** Acute CTCF loss lowers MYC and distant contact in SEM but has minimal global and little HUDEP2 MYC effect.

**Does not show:** Lineage-specific necessity with direct protein functions; cannot generalize from a responsive tumour line.

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

### [56] Chromatin structure dynamics during the mitosis-to-G1 phase transition.

**Shows:** Postmitotic contacts reform with distinct kinetics; regulatory interactions can precede CTCF/cohesin loops.

**Does not show:** Time-course order and synchronization alone do not isolate causal architecture.

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

### [57] Spatial partitioning of the regulatory landscape of the X-inactivation centre.

**Shows:** 5C and microscopy identify domains; boundary disruption causes ectopic contacts and transcriptional misregulation.

**Does not show:** Local regulatory content and X-inactivation specialization limit global inference.

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

### [58] Two independent modes of chromatin organization revealed by cohesin removal.

**Shows:** Adult hepatocyte Nipbl deletion removes TADs and peaks while compartments strengthen; 1,124 genes and 1,107 exogenic regions change, yet TADs also disappear in expression-stable regions.

**Does not show:** Chronic loader loss affects protein biology; liver context and residual fine structures must be retained.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 8:Main text (unsectioned body paragraphs), 0:Disappearance of TADs and peaks, 2:Transcriptional changes upon TAD loss. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.

### [59] Induction of a chromatin boundary in vivo upon insertion of a TAD border.

**Shows:** Relocated HoxD boundary recruits architectural proteins and divides a host domain in vivo.

**Does not show:** Structural sufficiency is demonstrated; abstract does not establish corresponding transcriptional primacy.

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

### [60] Live-cell imaging reveals enhancer-dependent Sox2 transcription in the absence of enhancer proximity.

**Shows:** Sox2 requires SCR enhancer yet contemporaneous bursts do not correlate with enhanced spatial proximity.

**Does not show:** SCR deletion validates enhancer dependence and lag-aligned analysis is null within examined window; labels lie 5–8 kb from elements and finite spatial/time resolution cannot exclude brief or historical contacts.

**Access/status:** Complete primary abstract and linked-status metadata examined. Selected body sections: 1:Results:paragraph5, 1:Results:paragraph45, 1:Results:paragraph46, 1:Results:paragraph51, 1:Results:paragraph52. No complete-paper or supplement audit claimed. none_found. Subclaims: SC1, SC2, SC3.