Exostosin-like 2 (EC 2.4.1.223) (Glucuronyl-galactosyl-proteoglycan 4- alpha-N-acetylglucosaminyltransferase) (Alpha-1,4-N- acetylhexosaminyltransferase EXTL2) (Alpha-GalNAcT EXTL2) (EXT-related protein 2); Glycosyltransferase required for the biosynthesis of heparan-sulfate and responsible for the alternating addition of beta-1-4-linked glucuronic acid (GlcA) and alpha-1-4-linked N- acetylglucosamine (GlcNAc) units to nascent heparan sulfate chains (330 aa)