To confirm that HLA-A*0201 breast cancer patients have a T cell repertoire similar to normal donors, three peptides (P3:SLAPTVHNV, P4:SLAPT(Tn)VHNV, and P15:SLAPPVHNV), which had elicited strong lytic responses from normal donors (Figure 3), were used for stimulation of T cells from three patients. The gene discussed is HLA-A; the disease is breast carcinoma.