Figure 4: RGS5-expressing ovarian tumors increase the number of CD31-positive vessel-like structures. Tumor specimens were sectioned and prepared on slides for immunofluorescence. (a) Tumor sections were imaged for CD31 expression (red, 20x magnification). (b) CD31-positive vasculature was quantified from compiled whole tumor images ( vector, RGS5) using CellSens and GraphPad Prism software. **, comparing vector versus RGS5.