Fig. S1

tfap2a morpholino-injected foxd3^zdf10 mutant embryos precisely phenocopy foxd3^zdf10;tfap2a^low double mutants. Embryos obtained from foxd3^zdf10 heterozygous matings were injected with tfap2a morpholino (tfap2aMO). Wild-type-tfap2aMO and foxd3^zdf10-tfap2aMO phenocopy tfap2a^low and foxd3^zdf10;tfap2a^low mutants, respectively, with 90% efficiency (n>1000). (A) Live larvae at 4 days post-fertilization (dpf), lateral views with either transmitted (left) or reflected (right) light. Compared with uninjected wild type, uninjected foxd3^zdf10 mutant and wild-type tfap2aMO-injected siblings, foxd3^zdf10-tfap2aMO larvae lack melanophores (left, arrows), xanthophores (left, arrowheads) and iridophores (right, white arrows), with the exception of occasional head xanthophores. (B) Alcian Blue staining at 4 dpf, ventral views, anterior to the left. All upper and lower jaw elements, as well as the anterior neurocranium, are absent in foxd3^zdf10-tfap2aMO embryos. (C) 16A11 immunoreactivity, 3 dpf, lateral views with anterior to the left. DRG (arrowheads) and enteric neurons (arrows) are absent in mutant morphants. (D) th expression at 48 hpf, lateral views with anterior to the left. Sympathetic neurons (arrowheads) are absent in foxd3^zdf10 mutants, tfap2a morphants and mutant morphants.