ID 2.4.1.150 DE N-acetyllactosaminide beta-1,6-N-acetylglucosaminyltransferase. AN I-branching beta1,6-N-acetylglucosaminyltransferase. AN N-acetylglucosaminyltransferase. CA a beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc CA derivative + UDP-N-acetyl-alpha-D-glucosamine = a beta-D-Gal-(1->4)-beta- CA D-GlcNAc-(1->3)-[beta-D-GlcNAc-(1->6)]-beta-D-Gal-(1->4)-N-acetyl-beta-D- CA glucosaminyl derivative + H(+) + UDP. CC -!- The enzyme acts on poly-N-acetyllactosamine [glycan chains of beta-D- CC galactosyl-(1->4)-N-acetyl-D-glucosamine units connected by beta(1,3) CC linkages] attached to proteins or lipids. CC -!- It transfers a GlcNAc residue by beta(1,6) linkage to galactosyl CC residues close to non-reducing terminals, introducing a branching CC pattern known as I branching. CC -!- Formerly EC 2.4.1.164. DR P97402, GCNT2_MOUSE; Q80RC7, GCNT3_BHV4 ; Q99CW3, GCNT3_BHV4D; DR Q805R1, GCNT3_BHV4L; Q9IZK2, GCNT3_BHV4V; Q866Z5, GCNT3_BOSMU; DR Q7YQE1, GCNT3_BOVIN; Q1M0V6, GCNT3_BUBBU; O95395, GCNT3_HUMAN; DR Q5JCT0, GCNT3_MOUSE; Q8CH87, GCNT3_RAT ; Q866Z6, GCNT3_SHEEP; DR Q866Z4, GCNT3_SYNCA; Q5U258, GCNT3_XENLA; Q8N0V5, GNT2A_HUMAN; //