Carbohydrate (chondroitin 4) sulfotransferase 13

Carbohydrate (chondroitin 4) sulfotransferase 13 is a protein that is encoded in humans by the CHST13 gene.
Function.
The protein encoded by this gene belongs to the sulfotransferase 2 family. It is localized to the golgi membrane, and catalyzes the transfer of sulfate to the C4 hydroxyl of beta-1,4-linked N-acetylgalactosamine (GalNAc) flanked by glucuronic acid residue in chondroitin. Chondroitin sulfate constitutes the predominant proteoglycan present in cartilage and is distributed on the surfaces of many cells and extracellular matrices.