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. 1978 Oct;136(1):63-8.
doi: 10.1128/jb.136.1.63-68.1978.

Relationship between phosphate content and immunochemical properties of subfractions of bakers' yeast mannan

Y Okubo, T Ichikawa, S Suzuki

Relationship between phosphate content and immunochemical properties of subfractions of bakers' yeast mannan

Y Okubo et al. J Bacteriol. 1978 Oct.

Abstract

The mannan of bakers' yeast (Saccharomyces cerevisiae) was fractionated on a column of diethylaminoethyl-Sephadex into five subfractions. Phosphate content of these mannan subfractions was proportional to the concentration of NaCl solutions used in the chromatographic separation. Quantitative precipitin reactions showed that the serological reactivities of the subfractions were proportional to the content of phosphate. The result of acetolysis study showed that the amounts of mannotetraose and phosphate-containing oligosaccharide fractions increased proportionally to the acidity, whereas the amount of mannose decreased inversely. The results from quantitative precipitin reaction tests and acetolysis study demonstrated that both phosphate contents and multiplicity of branching moieties of mannan subfractions increased proportionally, i.e., micro-heterogeneity concerning the acidity comprised in the parent bulk mannan is not attributable merely to the coexistence of molecular species containing different amounts of phosphate but also to the presence of more of the branching moieties.

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