Intracellular pH of Thermoplasma acidophila.

Abstract

Thermoplasma acidophila, a mycoplasma-like organism, was grown at 56 degrees C and pH 2. The intracellular pH of this organism is close to neutral as measured by the distribution of a radioactive weak organic acid, 5,5-dimethyl-2,4-oxazolidinedione, across the plasma membrane. The cell can maintain the pH gradient when subjected to heat or to metabolic… (More)

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