(A) and (B), neu3.1 expression in the gut of 2 dpf and 4 dpf embryos. li, liver; pa, pancreatic area; in, intestine; nt, neural tube; nc, notochord; gt, gut tube. (C–F) neu4 expression in the eye region (lens placode) of a 25-somite (21 hpf) embryo (C) and in the lens of 24 hpf (D), 2 dpf (E) and 3 dpf (F) embryos. In the case of (F), a higher magnification is shown. lp, lens placode; oc, optic cup; re, retina; ls, lens; le, lens epithelium. Embryos are in ventral (A), dorsal (C, D) and lateral (E, F) views with anterior to the left. (B) is a 40 μm transversal vibratome section. Magnification: (A–D); 20×, (E) and (F); 100×.