A water-soluble protein containing glucan was isolated from an edible mushroom, Termitomyces microcarpus (var). It was found to contain 55% of carbohydrate and 40% of protein. The protein part was found to consist of glutamine, arginine, isoleucine, leucine and phenylalanine. The structure of the glucan was analyzed on the basis of total acid hydrolysis, methylation, periodate oxidation and NMR studies (1H, 13C, TOCSY, DQF-COSY, NOESY, and HMQC), and the repeating unit of the glucan is established as: → 6)-α-D-Glcp-(1→
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