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Regulation of VEGFR1 and VEGFR2 expression by Nox1 in vivo. ISH reveals high-level expression of flt-1 (VEGFR1) (a and b) and kdr (VEGFR2) (c and d) mRNAs by endothelial cells in blood vessels in YA28 tumors. (a and c) Brightfield photomicrographs. (b and d) Darkfield photomicrographs.
