Abstract
Two isolates of Cryptococcus neoformans were studied to determine whether or not differences in chemical composition of the cell walls existed. Aerated cultures of both isolates were grown at 37°C. in a synthetic liquid medium. A purified cell wall fraction was obtained by repeated passage of cells through a French pressure cell followed by differential centrifugation. Chemical analyses of cell wall fractions of each of these strains showed quantitative differences in 3 major groups of compounds. The isolate from the patient contained a higher percentage of hexose and a lower percentage of hexosamines and lipids than did the soil isolate.
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