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Fig. 1. The knot gene is a candidate UBX-regulated target gene. (A) Knot
protein (red) is expressed at the anteroposterior compartment boundary in the
developing wing of Drosophila melanogaster, but is absent from the
haltere (inset). Engrailed protein (green) indicates the extent of the
posterior compartment, which is smaller in the haltere than in the wing. (B)
The distribution of Knot protein in D. pseudoobscura is identical to
that in D. melanogaster. (C) In mitotic clones that overexpress UBX
protein (blue), Knot is cell-autonomously repressed. (C) Courtesy of Ron
Galant.
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