Fig. 7. Tsh is repressed by Dpp signaling. Clones expressing activated Thickveins were induced in larvae of the following genotype: y w act>CD2>Gal4/y w HSflpI; UAS-tkv* /UAS-GFP. Clones were induced at 48-72 hours after egg laying. An optical section of a late third instar wing disc is shown. Tsh (green) expression is repressed in tkv*-expressing clones (arrows). Hth (blue, or white in single channel) is repressed in some cells of the lateral clones. Hth is not repressed by clones in the Hth ring 3 (arrowhead). Cells that express both proteins appear pink.