ID 2.4.1.148 DE acetylgalactosaminyl-O-glycosyl-glycoprotein beta-1,6-N- DE acetylglucosaminyltransferase. AN core 6beta-GalNAc-transferase B. AN O-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase AN IV. CA (1) 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-N-acetyl-alpha-D- CA galactosaminyl]-L-seryl-[protein] + UDP-N-acetyl-alpha-D-glucosamine = CA 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-[N-acetyl-beta-D-glucosaminyl- CA (1->6)]-N-acetyl-alpha-D-galactosaminyl]-L-seryl-[protein] + H(+) + UDP. CA (2) 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-N-acetyl-alpha-D- CA galactosaminyl]-L-threonyl-[protein] + UDP-N-acetyl-alpha-D-glucosamine = CA 3-O-[N-acetyl-beta-D-glucosaminyl-(1->3)-[N-acetyl-beta-D-glucosaminyl- CA (1->6)]-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] + H(+) + CA UDP. CC -!- cf. EC 2.4.1.102, EC 2.4.1.146 and EC 2.4.1.147. DR Q80RC7, GCNT3_BHV4 ; Q99CW3, GCNT3_BHV4D; Q805R1, GCNT3_BHV4L; DR Q9IZK2, GCNT3_BHV4V; Q866Z5, GCNT3_BOSMU; Q7YQE1, GCNT3_BOVIN; DR Q1M0V6, GCNT3_BUBBU; O95395, GCNT3_HUMAN; Q5JCT0, GCNT3_MOUSE; DR Q8CH87, GCNT3_RAT ; Q866Z6, GCNT3_SHEEP; Q866Z4, GCNT3_SYNCA; DR Q5U258, GCNT3_XENLA; //