2.4.1.149 N-acetyllactosaminide beta-1,3-N-acetylglucosaminyltransferase; uridine diphosphoacetylglucosamine-acetyllactosaminide beta1->3-acetylglucosaminyltransferase; poly-N-acetyllactosamine extension enzyme; Galbeta1->4GlcNAc-R beta1->3 N-acetylglucosamin • • •