Table 5.

Five Known Endothelial-Specific Genes in the CGAP SAGE Pools

Known endothelial-specific gene	Tags in the nonendothelial SAGE libraries	Tags in the endothelial SAGE libraries
von Willebrand factor (vWF)	1 (colon carcinoma cell line)	80
FLT1 VEGF receptor	—	—
KDR VEGF receptor	1 (IOSE29 ovarian surface epithelium cell line)	6
TIE1 tyrosine kinase	17 (ovarian tumour and normal ovarian epithelium cell lines)	27
TIE2/TEK tyrosine kinase	4 (ovarian carcinoma and glioblastoma multiforme cell lines)	2

TIE1 and TIE2/TEK have multiple hits in the nonendothelial pool (most in normal or carcinoma cell lines of ovarian origin). vWF is most endothelial specific, having 80 hits in the endothelial pool and only one hit in the nonendothelial pool.