acetylglucosaminyltransferase activity lactosylceramide 1,3-N-acetyl-beta-D-glucosaminyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 EC:2.4.1.206 molecular_function MetaCyc:2.4.1.206-RXN GO:0047256 Catalysis of the reaction: a beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-Cer(d18:1(4E)) + UDP-N-acetyl-alpha-D-glucosamine = a beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-Cer(d18:1(4E)) + H+ + UDP. RHEA:13905 LA2 synthase activity beta1->3-N-acetylglucosaminyltransferase activity UDP-N-acetyl-D-glucosamine:D-galactosyl-1,4-beta-D-glucosylceramide beta-1,3-acetylglucosaminyltransferase activity Reactome:R-HSA-9846501 uridine diphosphoacetylglucosamine-lactosylceramide beta-acetylglucosaminyltransferase activity lactosylceramide beta-acetylglucosaminyltransferase activity