Fig. 6. Comparison of E(spl)m7VP16 with E(spl)m7KNEQ-VP16 in the
activation of EE4-lacZ and Ac expression. (A-F) X-gal staining of
EE4-lacZ wing disks. (G-I) immunostaining for Ac protein. (A,G) Wild
type. (B,H) UAS-E(spl)m7VP16; pnr-GAL4. (C,I)
UAS-E(spl)m7KNEQ-VP16; pnr-GAL4. Reporter activation at the SC (white
arrowhead) and DC (black arrowhead) proneural clusters is seen at equally high
levels in B and C. (D) UAS-sc; pnr-GAL4. (E) UAS-sc
UAS-E(spl)m7VP16; pnr-GAL4. F: UAS-sc UAS-E(spl)m7KNEQ-VP16;
pnr-GAL4. X-gal development in D-F is at equivalent levels, as judged by
the wing-margin proneural clusters, where pnr-Gal4 is not expressed.
Note the increased transcriptional response of the EE4-lacZ reporter
in E and F compared with D.