Reports

Potassium-Adenosine Triphosphate Complex: Formation Constant Measured with Ion-Selective Electrodes

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Science  19 Jun 1970:
Vol. 168, Issue 3938, pp. 1460
DOI: 10.1126/science.168.3938.1460

Abstract

Valinomycin and glass electrodes were used to measure activity of potassium ions in equilibrium with adenosine triphosphate. The thermodynamic formation constant of the complex is approximately 25 times greater than indirect measurements predict.