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