The research was intended to establish whether phytase is produced by the baker's yeast Saccharomyces cerevisiae and by the liquid preferment microflora: the yeasts Saccharomyces minor and lactic acid bacteria. It was found that phytase is present in Saccharomyces cerevisiae and Saccharomyces minor, and absent in lactic acid bacteria cells. The determined activity values suggest that the yeast phytase is proba bly of slight practical significance since it is capable of decomposing less than 5% of the total phytates in flour.
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