2.4.1.41	polypeptide N-acetylgalactosaminyltransferase	mucin core 3 and core 4 O-glycosylation	
2.4.1.147	acetylgalactosaminyl-O-glycosyl-glycoprotein beta-1,3-N-acetylglucosaminyltransferase	mucin core 3 and core 4 O-glycosylation	
2.4.1.148	acetylgalactosaminyl-O-glycosyl-glycoprotein beta-1,6-N-acetylglucosaminyltransferase	mucin core 3 and core 4 O-glycosylation