Fig. 9. low (tfap2a)-dependent and -independent aspects of neural crest development. (A) Zebrafish larva (72 hpf) and the locations of cell types severely disrupted in low mutants [and therefore largely tfap2a dependent (red)] and others that are less effected (blue). (B) Putative roles of tfap2a in gene regulation in the premigratory crest and specification of subpopulations of neural crest derivatives (red).