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Fig. 4. Epistasis results from misexpression and mutants. Sca or Gp150 were
targeted to wing regions anterior to the AP compartment boundary using the
dppGal4 driver. In C and F, wings that are dissected from dead pharate adults
and expanded artificially (Couso and
Martinez Arias, 1994) have a rounded appearance because of the
procedure rather than the genotype. (A) Wild-type wing. (B) The
dppGal4/UAS sca wing has a nicked wing margin
(Lee et al., 2000). (C)
UAS gp150 /UAS gp150; dppGal4/+ is similar. (D) UAS
gp150/+; dppGal4/UAS sca is more severe despite fewer
doses of UAS gp150. (E) Normal wing from
gp1503/gp1504;
dppGal4/UAS sca fly. (F) Nicked wing from
scaBP2/scaBP2;
dppGal4/UAS gp150 fly.