The relative activities of the C2GnT1 and ST3Gal-I glycosyltransferases determine O-glycan structure and expression of a tumor-associated epitope on MUC1. - Dalziel M; Whitehouse C; McFarlane I; Brockhausen I; Gschmeissner S; Schwientek T; Clausen H; Burchell JM; Taylor-Papadimitriou J (The Journal of biological chemistry, 2001)