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RNase protection assay (RPA) analysis for vascular-associated markers expressed by human ovarian cancer cell lines (OVCAR3, SKOV3, EG, 222, and A2780-PAR), immortalized normal ovarian surface epithelial cells (HIO 1120 and HIO 180), and normal endothelial cells (human umbilical vein endothelial cells) as an internal positive control. Equal loading was assessed by L32 and GAPDH expression.
