Fig. 7
Failure of tbx5-expressing cells to move towards the pectoral fin buds in the absence of fgf24 activity. Shown is a time course of tbx5 expression in the pectoral fin region (arrowheads) from 18 hpf to 32 hpf in wild-type and fgf24 mutant embryos. Pictures were taken as oblique side views of embryos, with anterior towards the left. (A) Wild-type tbx5 expression at 18 hpf. (B) tbx5 expression at 18 hpf in the absence of fgf24 activity. (C) Wild-type tbx5 expression at 27 hpf. (D) tbx5 expression at 27 hpf in the absence of fgf24 activity. (E) Wild-type tbx5 expression at 32 hpf. (F) tbx5 expression at 32 hpf in the absence of fgf24 activity. Scale bar: 100 µm. All photos are at the same magnification.