ID 2.4.1.102 DE beta-1,3-galactosyl-O-glycosyl-glycoprotein beta-1,6-N- DE acetylglucosaminyltransferase. AN beta6-N-acetylglucosaminyltransferase. AN O-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase AN I. CA (1) O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L- CA seryl-[protein] + UDP-N-acetyl-alpha-D-glucosamine = 3-O-{beta-D- CA galactosyl-(1->3)-[N-acetyl-beta-D-glucosaminyl-(1->6)]-N-acetyl-alpha-D- CA galactosaminyl}-L-seryl-[protein] + H(+) + UDP. CA (2) O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L- CA threonyl-[protein] + UDP-N-acetyl-alpha-D-glucosamine = 3-O-{beta-D- CA galactosyl-(1->3)-[N-acetyl-beta-D-glucosaminyl-(1->6)]-N-acetyl-alpha-D- CA galactosaminyl}-L-threonyl-[protein] + H(+) + UDP. CC -!- The enzyme catalyzes the addition of N-acetyl-alpha-D-glucosamine to CC the core 1 structure of O-glycans forming core 2. DR Q92180, GCNT1_BOVIN; Q02742, GCNT1_HUMAN; Q09324, GCNT1_MOUSE; 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; Q71SG7, GCNT4_DANRE; Q9P109, GCNT4_HUMAN; DR E9Q649, GCNT4_MOUSE; //