Expression of snrk-1 during embryonic zebrafish development. (A-F) Whole-mount in situ hybridizations using digoxigenin-labeled snrk-1 antisense probes. At 24 hpf (A,B) and beyond (C-E) until 96 hpf (F), snrk-1 expression is restricted to head and trunk regions. In the trunk, section of 24 hpf snrk-1 in situ embryo (H) show expression in the dorsal aorta (DA), posterior cardinal vein (PCV), and the regions surrounding these 2 structures. No indicates notochord. Red arrow points to PCV and black arrow points to DA. The plane of the section in panel H is shown in panel G. (I) The orientation of the embryos.