Fig. 4. bab expression partially depends on Ss in the antenna and leg. (A,A') Proximal tarsal rings of Bab (purple in all panels) expression are lost in the ss null leg, while a distal ring of bab expression remains. (B,B') Expression of bab in the coxa is unaffected in ss mutants. Bab expression is partially lost in the ss null antenna, only one ring remains. Since these antennae are transformed toward leg, this ring is likely to represent the distal leg ring of bab. bab expression is partially derepressed distally in both the ss mutant leg and antenna. Expression of Dll appears normal in these discs (green in A and B).
