Predicted to enable beta-galactosyl-N-acetylglucosaminylgalactosylglucosyl-ceramide beta-1,3-acetylglucosaminyltransferase activity. Involved in brain development. Predicted to be integral component of membrane. Predicted to be active in Golgi membrane. Orthologous to human B3GNT5 (UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 5). [provided by Alliance of Genome Resources, Apr 2022]