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Fig. 3. Expression of drl in the salivary gland is dependent on
Scr and fkh. (A-C) In situ hybridizations for
drl were performed on stage 11 wild-type (A)
Screk6 (B) and fkhXT6 (C) mutant
Drosophila embryos. drl expression in the salivary placode
is absent in both Scr and fkh mutants, indicating that
drl is a transcriptional target of FKH. Arrow in A denotes the
location of drl in wild-type salivary placodes.