This illustrates the fact that the effect of ST6GalNAc1 expression varies with cancer types, and this may be due to the fact that in some cancers the expression of ST6GalNAc1 overrides the expression of T synthase to form the STn antigen and prevents the further addition of sugar residues by the GalNAcT’s enzymes [23]. This evidence concerns the gene B4GALNT1 and cancer.