Protein constituents of cell walls of the dimorphic phases of Blastomyces dermatitidis

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Abstract
Some aspects of alkali-soluble proteins extracted from yeast- and mycelial-phase cell walls of Blastomyces dermatitidis were investigated. The mycelial phase was found to contain protein in ammonium sulfate fraction A whereas, the yeast phase had protein in both precipitable A and nonprecipitable B fractions. The different fractions were found to vary quantitatively and qualitatively in amino acid constituents. Proteins were also found to vary electrophoretically in both phases on SDS (sodium dodecyl sulfate) polyacrylamide gels. Cysteic acids and disulfide groups were found to be in highest amounts in the mycelial phase fraction A in comparison to other fractions. Disulfide reductase may have no role in the dimorphism of B. dermatitidis.

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