Consistent with the presence of mitochondrial MRP-1 in cancer cell lines, there was clear co-localisation of the mitochondrial marker Grp75 (red) and MRP-1 (green) in 7/7 primary ESFT (example shown in Figure 3A), 2/2 thyroid carcinomas (example shown in Figure 3B), 1/1 haemangioma, 2/2 melanomas and 1/1 soft tissue rhabdomyosarcoma. This evidence concerns the gene HSPA9 and melanoma.