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 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine enzyme is associated with large chondroitin sulfate-containing proteoglycans 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine enzyme initiates the biosynthesis of glycosaminoglycan lateral chains in proteoglycans by transfer of xylose from UDP-xylose to specific serine residues of the core protein 2.4.2.26 UDP-alpha-D-xylose + [protein]-L-serine initiates the biosynthesis of the glycosaminoglycan linkage region 2.4.2.26 UDP-D-xylose + epidermal growth factor-like protein - 2.4.2.26 UDP-D-xylose + proteoglycan core protein the xylosyltransferases I and II catalyze the transfer of xylose from UDP-xylose to selected serine residues in the proteoglycan core protein, which is the initial and rate limiting step in glycosaminoglycan biosynthesis