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. 1971 Jul;68(7):1488–1492. doi: 10.1073/pnas.68.7.1488

Valinomycin-Induced Uptake of Potassium in Membrane Vesicles from Escherichia coli

Pinakilal Bhattacharyya *, Wolfgang Epstein †, Simon Silver *
PMCID: PMC389224  PMID: 4934520

Abstract

Osmotically shocked Escherichia coli and membrane vesicle ghosts from E. coli cells have lost the ability to accumulate potassium by active transport. The addition of valinomycin to the membrane ghosts restores the capacity to accumulate radioactive 42K and 86Rb by a temperature- and energy-dependent process. Membrane vesicles prepared from mutants of E. coli altered in potassium transport show defects in the valinomycin-stimulated accumulation of 42K that are related to the defects in the intact cells.

Keywords: K-uptake mutants, active transport

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Selected References

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