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Repression of the acid phosphatase of Saccharomyces bisporus in relation to the polyphosphate content of the cells.

The relationship between the level of stored polyphosphate in growing cells of Saccharomyces bisporus and the repressing or derepression of the synthesis of the enzyme acid phosphatase (EC 3.1.3.2) was investigated. Time-course studies showed that there is no correlation between the cellular concentrations of either polyphosphate or orthophosphate and the ability of the cells to form this enzyme. The only compound investigated that was capable of repressing acid phosphatase synthesis was orthophosphate in the growth medium (i.e. orthophosphate outside the cell).