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Effect of Oxygen on Endogenous Metabolism of a Respiratory-deficient Brewer's Yeast

Abstract

IN a previous communication, a strain of brewer's yeast was described which can utilize its carbohydrate reserves by a fermentative mechanism1. During this work it was observed that the presence of oxygen resulted in yeast carbohydrate being degraded at a faster rate. In this yeast, investigation of the effect of oxygen on the endogenous fermentation was hampered by oxidation of ethanol and liberation of respiratory carbon dioxide. A respiratory-deficient mutant provides a system wherein the residual respiration does not interfere to a significant extent. Experiments with one of these mutants have shown that oxygen stimulates the endogenous fermentation.

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References

  1. Chester, V. E., Nature, 183, 902 (1959).

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  2. Lindegren, C. C., Nagai, S., and Nagai, H., Nature, 182, 446 (1958).

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  3. Ogur, M., St. John, R. C., and Nagai, S., Science, 125, 928 (1957).

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  4. Kaplan, N. O., and Ciotti, Margaret M., ‘Methods in Enzymology’, 3, edit. by Colowick, S. P., and Kaplan, N. O. (Academic Press, Inc., New York, 1957).

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CHESTER, V. Effect of Oxygen on Endogenous Metabolism of a Respiratory-deficient Brewer's Yeast. Nature 184, 1956–1957 (1959). https://doi.org/10.1038/1841956a0

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