Yeasts phosphonomannan

The pea lectin precipitated with muscle glycogen, yeast mannan from Saccharomyces cerevisiae, and O-phosphonomannan from Pichia pinus.122 All of these reactions were inhibited by specific, sugar haptens (D-mannose, D-glucose, and D-fructose).122... 

Wickerham has discussed in detail the relationship of the phos-phonomannans produced by certain Hansenula and Pichia species to their taxonomy and phylogeny. If phosphonomannans should be detected in other fungi, this might indicate a relationship which would aid in the elucidation of the origin of the yeasts. 

Phosphonomannans, fungal, 394,417 Phosphorus, in yeast mannan, 391 Phosphorylases active sites of, 346 amino acids of, 345 kinetics, 289,353 mechanism of action of, 356 properties of, 347... 

O-Phosphono-D-mannans have been isolated from several strains of yeast. Stewart and Ballou have observed a great variation in the phosphorus content of diflFerent mannans, the highest being in Kloeckera brevis mannan, which has one phosphorus atom for every nine D-mannose residues. These phosphonomannans appeared to have a structure similar to that of the mannan already described, except for the presence of phosphate groups. ... 

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