Fig. 5. BMP gene expression in the pharyngeal pouches during epibranchial
development, and defects in cas mutants. Lateral views, anterior to
the left. Whole-mount in situ hybridization was performed in wild types at 22
hpf (top row), 30 hpf (second row) and 40 hpf (third row), and in cas
mutants at 40 hpf (bottom row), for bmp2a (A,E,I,M), bmp2b
(B,F,J,N), bmp4 (C,G,K,O) and bmp5 (D,H,L,P). Arrows
indicate initial expression at the ventrolateral edges of each pouch. Arrow in
H denotes bmp5 expression in the dorsal pouches. 1-5, pharyngeal
pouches; ot, otic capsule.