Chondroitin sulfate (CS) is covalently attached to the proteins form a class of proteoglycans glycosaminoglycans. Chondroitin sulfate is widely distributed in animal tissue extracellular matrix and cell surface sugar chains composed of alternating glucuronic acid and N- acetylgalactosamine (also known as N- acetylgalactosamine) disaccharide units, by a sugar-like linking area is connected to the core protein serine residues.
Chondroitin sulfate is present in all organisms from nematodes to humans except for plants, it plays many important physiological functions. Although the polysaccharide backbone structure is not complicated, but on the degree of sulfation, sulfate groups and two very different to the heterogeneous distribution chain uronic acid and then within it, showing a high degree of heterogeneity. Chondroitin sulfate fine structure determines the interaction of specific protein molecules and with a variety of functions.
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