Fig. 9. sens represses the expression of a reaper reporter in the salivary glands. (A,A',A'') In wild type embryos, at stage 12 the Rpr-11-lacZ expression (green) is observed in the dorsal posterior cells of the salivary placodes. (C,C',C'') At later stages, expression of Rpr-11-lacZ in barely above background levels throughout the salivary glands. (B,B',B'',D,D',D'') By contrast, sens^E2 embryos show marked upregulation of Rpr-11-lacZ expression in the salivary placodes and in the invaginated portion of the salivary glands at stage 12 and continue to show high expression at later stages in the salivary glands.