Fig. 3. tsh represses Ubx and labial. Side views of ∼14-h-old embryos bearing Ubx RP, stained with antibody against lacZ to visualize enhancer activity (A and B), or with antibody against Labial (C, D and E). (A and C) wild type; (B and D) tsh⁸/tsh⁸; (E) UAS.Tsh/ 48Y.Gal4. Note the increased width of Ubx RP and labial expression in tsh mutants, and the repression of labial by endodermally overexpressed Tsh.