Tags: Protein.
Sialyltransferases are enzymes that transfer sialic acid to nascent oligosaccharide.Each sialyltransferase is specific for a particular sugar substrate. Sialyltransferases add sialic acid to the terminal portions of the sialylated glycolipids (gangliosides) or to the N- or O-linked sugar chains of glycoproteins. The biosynthesis of disaccharides oligosaccharides and polysaccharides involves the action of hundreds of different glycosyltransferases.