. "\"Catalysis of the reaction: UDP-N-acetyl-D-glucosamine + beta-D-galactosyl-1,4-N-acetyl-beta-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-beta-D-glucosylceramide = UDP + N-acetyl-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-N-acetyl-beta-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-beta-D-glucosylceramide.\" [EC:2.4.1.163]" . . "beta-galactosyl-N-acetylglucosaminylgalactosylglucosyl-ceramide beta-1,3-acetylglucosaminyltransferase activity" . "UDP-N-acetyl-D-glucosamine:beta-D-galactosyl-1,4-N-acetyl-beta-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-beta-D-glucosylceramide beta-1,3-acetylglucosaminyltransferase activity" . "EC:2.4.1.163" . "MetaCyc:2.4.1.163-RXN" . "RHEA:23007" . . "poly-N-acetyllactosamine extension enzyme activity" . "uridine diphosphoacetylglucosamine-acetyllactosaminide beta1->3-acetylglucosaminyltransferase" .