Microfluidic concatemer sequencing unveils cooperative and competitive enhancer clusters in gene regulation.

Drop-t, a microfluidics-based chromatin architecture method, reveals that enhancer-promoter interactions can compete or cooperate, linked to dictator versus leader gene classes.

• Why it matters: Higher-order chromatin looping is central to gene regulation, but prior technical limits have left cooperative versus competitive enhancer behavior unresolved.
• What they did: The study introduces Drop-t to profile higher-order chromatin architecture at single-molecule and population scales, showing resistance to ligation-induced DNA entanglements and improved relevance versus ligation-free approaches.
• The result: Drop-t uncovers extensive non-specific EPIs that may shape transcriptional variability by competing with specific EPIs, and it classifies genes as dictator or leader based on competitive versus cooperative specific EPIs.

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