What is strongly supported: H3K27ac and H3K9ac correlate with active promoters/enhancers; p300/CBP and bromodomain proteins recruit coactivation and remodeling machinery.
What is context-dependent: Specific acetyl marks can have different readers and effects; HDAC inhibition produces broad indirect effects.
What is weak, controversial, or assay-biased: Assuming H3K27ac alone defines an active enhancer can overcall poised or nonfunctional regions; ChIP signal is correlative without perturbation.
What may be duplicate biology under another name: Overlaps with HUBS, SHUFFLER, KEYS.
Missing or excessive graph structure
Missing edges: Add HDAC/repressor connection to WRITER-R/SILENCER context if desired.
Excess edges: OPENER -> ZONES is accurate as association but not a sufficient driver of compartment A.
Candidate splits: No split.
Candidate merges: No merge.
Candidate renames: ACETYLATION would be clearer.
Recommendation
Concrete graph change, if any: Keep; add reader-mediated and correlative caveats for H3K27ac.
Concrete technical-notes/blog wording change, if any: Mirror the graph recommendation in the glossary and relation catalogue, and explicitly mark the confidence/caveat where the claim is context-dependent or assay-sensitive.
Key sources
PMID 26383031 — chromatin modifications and enhancer/promoter activity review.
PMID 22955617 — p300/CBP and enhancer acetylation functional context.
PMID 24461490 — BRD4/bromodomain link between acetylated chromatin and transcription.
PMID 32632239 — enhancer mark interpretation and functional validation caveats.