2.4.2.26 additional information involved in the biosynthesis of the linkage region of proteochondroitin sulfate 2.4.2.26 additional information enzyme activity in seminal plasma of infertile men is significantly reduced 2.4.2.26 additional information first enzyme required for the generation of chondroitin and heparan sulfate glycosaminoglycan chains of proteoglycans 2.4.2.26 additional information synthesis of chondrioitin and heparan sulphates is initiated by UDP-alpha-D-xylose:proteoglycan core protein beta-D-xylosyltransferase 2.4.2.26 additional information xylosyltransferase II is involved in the biosynthesis of the uniform tetrasaccharide linkage region in chondroitin sulfate and heparan sulfate proteoglycans 2.4.2.26 additional information XT-II initiates the biosynthesis of both heparan sulfate and chondroitin sulfate 2.4.2.26 additional information the enzyme is also able to use UDP-glucose as donor substrate 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine - 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine initiation of chondroitin sulfate biosynthesis 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine enzyme may play a role in maintaining the haemostatic potential of the follicular fluid