MUC1 and breast cancer: The epitope mappingof a MUC1 library containing peptides and Tn-glycopeptideswith several glycosylation sites and two families of cancer-relatedantibodies has been recently characterized.51 The first family includes two anti-MUC1 antibodies, VU-3C6 and VU-11E2,that recognize tumor-associated MUC1 in breast cancer.