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J Bacteriol. 1982 September; 151(3): 1146–1152.
PMCID: PMC220390

Genetic analysis of the pyruvate decarboxylase reaction in yeast glycolysis.

Abstract

Six different pyruvate decarboxylase mutants of Saccharomyces cerevisiae were isolated. They belong to two unlinked complementation groups. Evidence is presented that one group is affected in a structural gene. The fact that five of the six mutants had residual pyruvate decarboxylase activity provided the opportunity for an intensive physiological characterization. It was shown that the loss of enzyme activity in vitro is reflected in a lower fermentation rate, an increased pyruvate secretion, and slower growth on a 2% glucose medium. The different effects of antimycin A on leaky mutants grown on ethanol versus the same mutants grown on glucose support the view that glucose induces some of the glycolytic enzymes, especially pyruvate decarboxylase.

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Selected References

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