In most experiments, B6.H60 mice (congenic for H6018) were irradiated and reconstituted with C3H.SW or B6 T cell-depleted BM (referred to as BM), with CD8+CD44+ TM from H60-vaccinated C3H.SW or B6 donors, with or without H60+ BC-CML18 (referred to as BC-CML). This evidence concerns the gene BCR and breast cancer.