Abstract
Summary
The premise that intracellular sodium is functionally a simple solution in a cell membrane is questioned by the authors and others(2,9). The data reported are interpreted as indicating that there is a component of intracellular sodium which is characterized by not being exchangeable with potassium ions. Fenn felt that such sodium ions were bound to myosin(1). The nuclei and mitochondria are suggested as additional possible sites of binding of such sodium.
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