Fig. 9. Absence of tfap2a activity leads to increased levels of apoptosis in cranial neural crest. (A,B) Dorsal view of wild-type (A) and mob^m610 (B) flat-mounted embryos at 26 hpf following TUNEL assay staining. Black arrowheads indicate the anterior and posterior extent of the otic vesicle. (C,D) Detection of dying cells by Acridine Orange staining of wild-type (C) and mob^m610 mutant (D) embryos at 25 hpf (lateral views). White arrowheads indicate increased levels of apoptosis. ov, otic vesicle; e, eye.