ST6GAL1 and colorectal carcinoma: The upregulation of Sia6LacNAc (see structure in Figure 3) and ST6GAL1 (ST6 beta-galactosamide alpha-2,6-sialyltranferase 1, a sialyltransferase that adds an α2-6-linked sialic acid to the N-glycan) are frequently observed in CRC cancers [64, 65].