This indicates that although the initial GalNAc residue in O-glycosylation biosynthesis is competed for by three types of glycosyltransferases (C1GalT1, β3GnT, and ST6GalNAc-transferase) [4], C1GalT1 is probably the predominate force, at least in these cancer cells. This evidence concerns the gene B3GNT2 and cancer.