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Fig. 2. Expression of btd (blue), hth (green) and Dll (red) in leg (A-C) and antennal (D-F) imaginal discs. (A) Triple staining for three genes. (B) btd and Dll. (C) btd and hth. Notice that the btd domain overlaps partially with those of Dll and hth, indicating that it is expressed both in the proximal and the distal leg domain. The arrow indicates the ventral region where btd and hth overlap. (D) Triple label. (E) btd and Dll. (F) btd and hth.