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Locus-Scale Massively Parallel Reporter Assays

McGee, A. V.; Biar, C. G.; Martin, B. K.; Li, T.; Lalanne, J.-B.; Kim, H.; Shendure, J.

2026-07-25 genomics
10.64898/2026.07.24.740649 bioRxiv
Show abstract

Interactions among cis-regulatory elements (CREs) are central to mammalian gene regulation. Long @$$ massively parallel reporter assays (LAMPRAs) integrate combinatorial cloning, molecular barcoding and long- and short-read sequencing, to scalably measure how CRE identities, numbers, spacings, orders, orientations, and interactions shape regulatory output at multi-kilobase length scales. As a proof-of-concept, we assay 36,000 x 5-kb synthetic cis-regulatory loci (sCRLs), each a 5 x 1-kb random combination of enhancers, insulators and spacers, to model how locus composition drives gene expression.

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