mef2ca is required for proper expression of hand2, bapx1, and gsc in postmigratory CNC. Lateral (A-D, G-J) and ventral (E,F) views of expression of hand2 (A-F) at 30 hpf (A,B) and 55 hpf (C-F), and bapx1 (G,H) and gsc (I,J) at 48 hpf in wild-type (A,C,E,G,I) and mef2ca mutants (B,D,F,H,J). (A-F) Ventrally restricted expression of hand2 is reduced in mef2ca mutants at 30 hpf, but recovers by 55 hpf. (G,H) bapx1 expression prefiguring the jaw joint is reduced in mef2ca mutants. (I,J) Ventral hyoid expression of gsc (arrow) is downregulated in mef2ca mutants. The hyoid joint region (arrowhead) remains devoid of gsc expression. Arches are numbered. m, mouth.