Predicted to enable N-acetyllactosaminide beta-1,3-N-acetylglucosaminyltransferase activity. Predicted to be involved in poly-N-acetyllactosamine biosynthetic process. Predicted to be integral component of membrane. Predicted to be active in Golgi membrane. Orthologous to human B3GNT4 (UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 4). [provided by Alliance of Genome Resources, Apr 2022]