Thiobacillus thiooxidansの電気化学ポテンシャルと菌体内アデニンヌクレオチド

概要

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Intracellular pH and electron motive force of Thiobacillus thiooxidans were measured. Intracelular pH was maintained between 5.5-5.8,and was not effected by environmental pH. Electron motive force value was highest at pH 2.0,mainly because of the contribution of ΔpH (difference of intracellular pH from environmental pH) rether than membrane potential. Total intracellular adenine nucleotides (ATP+ADP) were most abundant in the exponential growth phase. In death phase, the value decreased to one percent of the that in the exponential phase. Therefore it was recognized that adenine nucleotides are important in cell growth. The energy charge of cells was almost constant over the range pH 2-8,but decreased at pH 1.0,as indicated by the fact that cell growth slowed down below pH 1.5.
社団法人日本生物工学会の論文
1984-03-25