Expression of nr2f1b in during zebrafish development. a At 15S, nr2f1b is expressed in the telencephalon (t), ventral medial diencephalon (d), hindbrain rhombomeres (h) and lateral plate mesoderm (lpm, arrow) corresponding in location to the developing vasculature. At 20hpf (~24S), nr2f1b is expressed in the vessels (b). c, c' At 24 hpf, nr2f1b is expressed in the telencephalon (t), diencephalon (d), hindbrain (h), as well as in vessels (v), and caudal vein plexus (CVP) of the trunk. c' is an enlargement of C. d, e Cross sections of embryos from c’ show that nr2f1b is expressed in dorsal aorta (da), posterior cardinal vein (pcv), and caudal vein plexus (CVP). Scale bars in all figures represent 100 μm.