Catalyzes the formation of the NeuAc-alpha-2,3-Gal-beta-1,4-GlcNAc-, NeuAc-alpha-2,3-Gal-beta-1,3-GlcNAc- or NeuAc-alpha-2,3-Gal-beta-1,3-GalNAc- sequences found in terminal carbohydrate groups of glycoproteins and glycolipids. The highest activity is toward Gal-beta-1,3-GlcNAc and the lowest toward Gal-beta-1,3-GalNAc
[1]Cloning and expression of human Gal beta 1,3(4)GlcNAc alpha 2,3-sialyltransferase.Kitagawa H., Paulson J.C.Biochem. Biophys. Res. Commun. 194:375-382(1993) [2]Structural variations of the alpha 2,3-sialyltransferase III, ST3GalIII, transcripts in hum