Polysaccharide C (poly C) has been isolated from two strains of S. epidermidis and characterized chemically. The results suggest that poly C is a wall N-acetylglucosaminylglycerol teichoic acid, linked through 1:3-phosphodiester linkages. One poly C preparation contained only beta-linked N-acetyglucosamine, the other traces of alpha-linked sugar in addition. The degree of substitution of sugar in the poly C preparations from the two strains was about 50 and 25 per cent.
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