To test cross-presentation of tumor antigens by Vγ9Vδ2 T cells, expanded Vγ9Vδ2 T cells were incubated for 24 hs with; the long gp100 peptide (29aa) which contains the minimal epitope flanked on both sides by several amino acids (Table 2); or the recombinant MART-1 protein; or the MAGE-A3 protein. The gene discussed is PMEL; the disease is neoplasm.