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Infra-red Spectroscopic Evidence of Chondroitin Polysulphate and its Relation to Anticoagulant Activity

Naturevolume 193pages578579 (1962) | Download Citation



CHONDROITIN sulphates, which are regarded as polymers composed of approximately equimolar quantities of N-acetylgalactosamine, hexuronic acid and sulphate, have been classified as chondroitin-4-sulphate (chondroitin sulphate A and B) and chondroitin-6-sulphate (chondroitin sulphate C)1. In infra-red spectroscopic studies, evidence has been presented that chondroitin sulphates showed characteristic absorption bands at the 700–1,000 cm.−1 region, which may differentiate chondroitin-4-sulphate and the 6-sulphate2–4. A recent communication5 indicated that the infra-red spectra of acetylgalactosamine-4-sulphate obtained from chondroitin sulphate A and B, and of acetylgalactos-amine-6-sulphate from chondroitin sulphate of shark cartilage, corresponded respectively to those of chondroitin-4-sulphate and the 6-sulphate. Accordingly, the spectral differences would be attributed to the presence of the C4 and C6 sulphate in the galactosamine moieties of chondroitin sulphates. Although chondroitin sulphate from shark cartilage has the high sulphur content of 7.6 per cent (1.3 residues of sulphate per acetylgalactosamine residue), the infra-red spectra are identical to that of chondroitin C from chordoma3,6.

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  1. Department of Physical Therapy and Internal Medicine, Faculty of Medicine, University of Tokyo



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