Representative flow cytometry scatter plots showing CD31 and CD90 staining. Unstained mixed cell population, LMVECs (Promocell) and fibroblasts (a). Endothelial cells stain positively for CD31 (b) and negatively for CD90 (c). Fibroblasts stain negatively for CD31 (d) but strongly positive for CD90 (e). Mixed Endothelial cells and fibroblasts show separation of the cell populations (f).