Abstract

The capsular polysaccharide produced by Cryptococcus laurentii (NRRL Y-1401) is composed of D-mannose (3 mol), D-glucuronic acid (1 mol), D-xylose (1 mol), and O-acetyl (~1 mol). Methylation, periodate oxidation, partial acid hydrolysis, optical rotation, and nuclear magnetic resonance studies showed that the polysaccharide is a high molecular weight branched polymer of regular structure having a repeating pentasaccharide unit with the structure:[Formula: see text]

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