Movie 8.

wnt9b is expressed in anterior and ventral regions of zebrafish embryos at 16 hpf, related to Fig. 2F,F′. Scroll through a series of confocal z-planes from the dorsal towards ventral side of a 16 hpf embryo. The expression of the neuronal Tg(elavl3:EGFP)^knu3 transgene is in posterior spinal cord neurons but not in anterior regions of embryos where wnt9b is expressed. Scale bar: 30 μm.