Catalyzes the transfer of N-acetylglucosamine (GlcNAc) to core 2 branched O-glycans . Necessary for the synthesis of type III mucin which is specifically produced in the stomach, duodenum, and pancreatic duct . May protect against inflammation-associated gastric adenocarcinomas (By similarity).
Subcellular locations: Golgi apparatus membrane
Detected in stomach and pancreas.