Cryptococcus flavescens

Kooiman separated exocellular amylose formed in liquid media at pH < 5 by Cryptococcus albidus and Cryptococcus laurentii var. flavescens NRRL Y-1401 from a polysaccharide containing D-man-nose, D-xylose, and D-glucuronic acid. X-Ray diffraction patterns of the retrograded amyloses were identical with that of tuber starch (B modification). Periodate oxidation, optical rotational measurements, and hypoiodite oxidation data suggested a linear a-D-(l—>4)-linked structure having a chain length of about 44 units for the Cr. albidus amylose. Cryptococcus neoformans produces a crystalline amylose that was isolated by the method of Schoch. It has an iodine value and alpha- and hefa-amylase hydrolysis characteristics similar to those of corn amylose. 

Tremella/Cryptococcus. The first definitive compositional and structural studies (, ) on a member of this family of polysaccharides were done on the heteropolysaccharide produced by C. laurentii var. flavescens NRRL Y-1401. Because haploid, yeastlike species of the basidiomycetous genus Tremella formed glucu-ronoxylomannans (GXM) similar to those from species of Crypto-coccus, a taxonomic relationship was suggested between the genera "(576)7 Basidiomycetous perfect states were subsequently discovered for C. laurentii (7 ) and C. neoformans ( ). 

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