FPR1 and melanoma: The important role of the uPAR84–95 sequence in determining invasive ability of melanoma cells was confirmed by the finding that specific antibodies recognizing uPAR84–95 as well as peptide inhibitors of the uPAR84–95/FPR1 interaction abrogate melanoma cell ability to move toward chemotactic gradients, to invade basal membranes and to cross endothelial monolayers.