HLA-A and melanoma: In this study, we used AAPCs generated in our laboratory, derived from murine NIH/3T3 fibroblasts and expressing the most frequent HLA class I molecule, HLA-A*0201, the three main accessory molecules (CD54, CD58, CD80) and a MART-1-derived peptide, MART-1 being an overexpressed antigen in melanoma (15).