Composition of the cell wall of Pityrosporum ovale (Bizzozero) Castellani and Chalmers

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Abstract
Fractions of the cell wall of the yeast, Pityrosporum ovale, were analyzed for neutral sugars, nitrogen, protein, hexosamines, cysteine + cystine, lipids, and ash as affected by age of cells and degree of breakage of cells. Neither the age of cells nor the degree of breakage influenced the composition of the fractions very much. The results indicate that the composition of the wall of P. ovale is substantially different from that of Saccharomyces cerevisiae, being higher in lipid, protein, and glucosamine. The polymerized N-acetyl-glucosamine in the wall seems to be present in a non-crystalline form. These results are consistent with known structural differences between the walls of the two genera.

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