ST3GAL1 and cancer: Its sialylated counterpart, the sialyl-T (sT) (Siaα2,3Galβ1,3GalNAc-O-Ser/Thr) structure and its main biosynthetic enzyme, the sialyltransferase ST3GAL1, are also aberrantly expressed in a variety of cancers [17, 18] [reviewed in [19, 20]].