Fig. 4. Ectopic expression of dally increases the sensitivity of cells to Dpp. Three examples are shown for anti-pMad antibody staining of wing discs bearing clones of cells overexpressing dally. (A,D,G) Patterns of pMad. (B,E,H) Position of dally-expressing clones marked by GFP expression. (C,F,I) Overlay images. The pMad levels are increased in the dally-expressing clones in the wing pouch (arrows) and the hinge region (arrowheads). Clones induced in the peripheral domain did not show the elevated pMad signals (asterisks).