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An improved method is described for the micro determination of acidic glycosaminoglycans after digestion with chondroitinase-ABC and -AC. The determination is based on the color production of D-gluco-4-enepyranosyluronic acid-containing disaccharides produced by the action of chondroitinase-ABC and -AC (acidic glycosaminoglycans-endoeliminase) when the periodate-thiobarbituric acid method is applied to the alpha,beta-unsaturated disaccharides. Suitable conditions for the quantitative assay are described.
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KOSEKI et al. (1978) studied this question.