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. Author manuscript; available in PMC: 2018 Oct 9.
Published in final edited form as: Curr Biol. 2017 Oct 9;27(19):R1047–R1049. doi: 10.1016/j.cub.2017.08.001

Figure 1. Transvection in Drosophila.

Figure 1

(A) Transvection in bx34e/Ubx1 trans-heterozygotes. Intronic abx and BRE enhancers on the Ubx1al-lele activate transcription from the bx34e allele in trans. (B) Loss of cis-linked promoter augments transvection. UbxMx6 mutation consists of a 3.4 kb deletion including the Ubx promoter. (C) 5′ wing and body enhancers on the promoter-less allele activate transcription from the enhancer-less allele in trans. W, wing enhancer; B, body enhancer; Br, bristle enhancer; T, tarsal claw enhancer. (D) Insulator DNAs facilitate transvection at yellow.