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Abstract
SUMMARY: The effect of CO2 on a decarboxylase system of Streptococcus diacetilactis has been investigated. It was found that the amount of CO2 produced by a culture of the living organism depended upon the proportion of CO2 present in the atmosphere. Under minimum p CO2 the production of CO2 by the organism was stimulated while accumulation of CO2 repressed the formation of the gas. It also appeared that the presence of excess of other products of reaction repressed the production of CO2. An explanation of these phenomena in terms of the law of mass action is advanced.
The effect of CO2 upon the production of decarboxylase by the organism was also investigated. There was some indication that the composition of the gaseous environment influenced the production of decarboxylase.
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