Predicted to enable glucuronosyl-N-acetylgalactosaminyl-proteoglycan 4-beta-N-acetylgalactosaminyltransferase activity. Predicted to be involved in chondroitin sulfate biosynthetic process. Predicted to be located in Golgi cisterna membrane. Predicted to be integral component of membrane. Orthologous to human CHSY3 (chondroitin sulfate synthase 3). [provided by Alliance of Genome Resources, Apr 2022]