Phosphomannanase (PR-factor), an enzyme required for the formation of yeast protoplasts.


The PR-factor, an enzyme necessary for the production of protoplasts from yeast, was identified and was named phosphomannanase. The enzyme released mannan and mannan-proteins from yeasts harvested in the logarithmic phase of growth. The size of the molecules released was greater than 200,000 daltons, which indicated that the enzyme splits very few bonds of… (More)


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