Intracellular pH of Thermoplasma acidophila.
Biochim Biophys Acta, 1975/5/21;389(3):477-82.
PMID: 236035
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 inhibitors. Our experiments seem to indicate that a major portion of the pH gradient is not maintained by active processes, but rather by a Donnan potential across the cell membrane.
MeSH terms
Biological Transport; Hot Temperature; Hydrogen-Ion Concentration; Kinetics; Malate Dehydrogenase; Mathematics; Mycoplasma; Oxazoles
More resources
EndNote: Download