Chondroitin trisaccharides

FIGURE 7-26 Proteoglycan structure, showing the trisaccharide bridge. A typical trisaccharide linker (blue) connects a glycosaminoglycan—in this case chondroitin sulfate (orange)—to a Ser residue (red) in the core protein. The xylose residue at the reducing end of the linker is joined by its anomeric carbon to the hydroxyl of the Ser residue. 

R15. Rod n, L., and Smith, R., Structure of the neutral trisaccharide of the chondroitin 4-sulphate-protein linkage region. J. Biol. Chem, 241, 5949-5954 (1966). 

Again, the product was identical to that of the naturally occurring trisaccharide unit in the chondroitin sulfate linkage region. 

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