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Fig. 4 Expression of genes identified in vascular endothelial cells.
Gene expression was examined at 24–28 hours post fertilization by whole mount in situ hybridization in wildtype embryos. (A) rasgrp3 is expressed weakly in the forebrain, hindbrain, spinal cord, intersomitic vessels, dorsal aorta, and caudal hematopoietic tail region. (B) tem8 is expressed highly in the cranial vasculature, the dorsal aorta and posterior cardinal vein, tailbud and weakly in the intersomitic vessels and spinal cord. (C) arhgap29 is expressed in the cranial vessels, dorsal aorta, posterior cardinal vein, intersomitic vessels, caudal hematopoetic tail region, and hatching gland. (D) fgd5 is expressed in the cranial vasculature, dorsal aorta, posterior cardinal vein, intersomitic vessels, and caudal hematopoetic tail region. (E, F, and G) yrk, similar to hemicentin, and sh3gl3 are all expressed in the cranial vasculature, dorsal aorta, posterior cardinal vein, intersegmental vessels, and caudal vascular hematopoietic tail region. (H) similar to costimulatory protein is expressed in the cranial vasculature, dorsal aorta, intersomitic vessels, and caudal hematopoietic tail region; additional expression is present in the ectoderm layer throughout the embryo. (I) ldb2 is expressed in the forebrain, midbrain-hindbrain boundary, dorsal aorta, intersomitic vessels, and caudal hematopoietic tail region. (J and K) Both est:AI721944 and est:AW019729 are expressed in the cranial vasculature, dorsal aorta, posterior cardinal vein, intersomitic vessels, and caudal hematopoietic tail region. (L) hapln1b is expressed in the cranial vasculature, posterior cardinal vein, caudal hematopoietic tail region, and hypochord. Abbreviations: f, forebrain; h, hindbrain; sc, spinal cord; cv, cranial vasculature; da, dorsal aorta; pcv, posterior cardinal vein; isv, intersomitic vessels; cht, caudal hematopoietic tail region; tb, tail bud; h, hatching gland; and hc, hypochord. Scale bar: 250 μm.