CSPG4 and melanoma: We analyzed the relative expression of CSPG4 in human melanoma cell lines (A375, A2058, WM1366, WM115, WM1361, G361, and SKMEL28) in comparison to cells not known to express CSPG4 (IGROV1 ovarian and SKBR3 breast cancer cells, and primary non-malignant melanocytes) (Fig. 3a).