Fig. 2. bab expression is dynamic during antenna and leg development. Bab (purple in all panels) is expressed throughout most of the Dll (green in all panels) expression domain in the early third instar in antenna (A,A') and leg (D,D'). By mid third instar, bab expression is lost in the distal-most part of the antenna (arrow in B') and two bab rings emerge (B,B'). At the same stage, bab expression is lost in the distal-most leg and a distal ring appears in the leg (E,E'). By late third instar, bab expression consists of two strong rings in the antenna (arrows in C and C') and four concentric rings in the tarsal region of the leg (arrows in F'). bab is also expressed in the presumptive coxa (cx) where it does not overlap with Dll.
