Fig. 8. Ectopic expression of Pb or Scr represses Sal expression in the antennae. (A) dpp-lacZ reporter stained for ß-gal (green) and Sal (red). Note the region of overlap between the reporter and Sal. (B-D) There is no overlap between Scr-expressing cells and the broken ring of Sal in a dpp=>Scr eye-antennal disc. (E-G) Similarly, there is no overlap between Pb-expressing cells and Sal expression in dpp=>pb eye-antennal discs. (B,E) Merged images; (C,D,F,G) separated channels.