Fig. 3
(A) Nomarski picture showing wild-type and syutq252 mutant embryos at 72 hpf in lateral view. The somites are clearly U-shaped and the horizontal myoseptum is missing in the syu mutant embryo, causing the failure of melanophores to assemble in a lateral stripe. (B) Dark-field picture showing the somites of wild-type and syutbq70 mutant embryos at 72 hpf in lateral view. Striated muscle shows a bright birefringence and somite boundaries show as dark lines. Wildtype somites are V-shaped and separated into a dorsal and a ventral part by the horizontal myoseptum. The somites in the syu mutant embryo are reduced in size, clearly U-shaped and lack a horizontal myoseptum.