2.4.1.174	glucuronylgalactosylproteoglycan 4-beta-N-acetylgalactosaminyltransferase	chondroitin biosynthesis	
2.4.1.175	glucuronosyl-N-acetylgalactosaminyl-proteoglycan 4-beta-N-acetylgalactosaminyltransferase	chondroitin biosynthesis	
2.4.1.226	N-acetylgalactosaminyl-proteoglycan 3-beta-glucuronosyltransferase	chondroitin biosynthesis