Immunohistochemistry (IHC) evaluations using a mouse anti-human CSPG4 antibody (detected by alkaline phosphatase (AP, pink)) in human melanomas (n = 428, Fig. 1e and Supplementary Fig. 1), and several normal tissues (n = 389) indicated detectable CSPG4 protein expression in 63% of malignant melanomas (n = 428, Fig. 1f). The gene discussed is CSPG4; the disease is melanoma.