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Fig. 5. tkv reverts the extended Dpp activity caused by Ubx loss.
(A-A'') Two clones merged at the A/P boundary of the haltere disc
(as revealed by hh-lacZ expression, not shown), and marked by the
absence of GFP expression (in green in A), show wider P-Mad signal (A')
and non-cell-autonomous expression both anteriorly and posteriorly to the
clones (arrowheads in A'). A'', merged image. (B-B''')
Clones mutant for Ubx and that simultaneously express tkv.
The clones are marked by GFP expression (in green in B). Note that P-Mad (in
red in B') and omb (in blue in B'') signals are restricted
to a few cells within the clones (compare with
Fig. 2E' and Fig.
5A'). Merged image in B'''. (C,D) P-Mad expression in
dpp-Gal4/UAS-tkv (C) and dpp-Gal4/UAS-Ubx
(D) wing discs. In both cases the extent of P-Mad signal is reduced, but the
level of expression in AB cells is increased, compared with that of wild-type
wing discs (Fig. 4A).
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