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Fig. 2. tkv -independent Dpp signaling differences in the wing and
haltere. (A) Wing and haltere discs in which tkv is
uniformly expressed from the Actin 5C promoter (act>tkv).
In the wing, the P-Mad gradient is compacted to a single stripe, similar to
the pattern found in the wild-type haltere
(Crickmore and Mann, 2006).
(B) Intensity traces for P-Mad in the wing (blue) and haltere (red)
shown in A. In the act>tkv wing, the P-Mad signal is symmetric
along the AP axis relative to the AP organizer, which is approximated by peak
P-Mad levels. In the act>tkv haltere, the P-Mad signal decays more
gradually in the A compartment (blue arrow) than in the P compartment. The
approximate position of the AP boundary is indicated by the arrow.
(C,D) Enlargements of the wing and haltere discs shown in A. W,
wing; H, haltere; A, anterior compartment; P, posterior compartment.
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