Fig. 3. The projection patterns to the ventral jaw muscles of mutants displaying defects in the outgrowth of the Vp and VII motor axons. Ventral views of the lower jaw of 72-hpf wild-type (A) and the four classes of mutant (B-H) zebrafish embryos. Anterior, top. The cranial motor axons were labelled with the Isl1-GFP transgene, and each jaw muscle was stained with rhodamine-phalloidin. The genetic locus of each mutation is shown below each panel.