Beta-1,2-N-acetylglucosaminyltransferase II N-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase II EC 2.4.1.143 Mannoside acetylglucosaminyltransferase 2 GlcNAc-T II Alpha-1,6-mannosyl-glycoprotein 2-beta-N-acetylglucosaminyltransferase GNT-II