Fig. 6. Dan acts downstream of ss. (A,B) Cuticle preparation of the antenna from a ss mutant. The arista is transformed to tarsus. (B is a higher magnification of A.) (C) Cuticle preparation of the antenna from a ss mutant expressing Dan under ptc^Gal4 control. Much of the distal arista is normal in morphology (compare with Fig. 1F). (D) ss mutant eye-antenna disc expressing Dan under ptc^Gal4 control. Dan (green) was repressed distally where Antp (red) was ectopically expressed (compare with Fig. 3A,B; Fig. 5F). Note that ectopic Dan (in the ptc^Gal4 expressing cells, blue) did not repress Antp expression.