Mobility of Potassium Ion in Frog Muscle Cells, both Living and Dead

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Science  06 Jul 1973:
Vol. 181, Issue 4094, pp. 78-81
DOI: 10.1126/science.181.4094.78


The diffusion coefficient of potassium ion (DK) in frog muscles was studied by a new method. In normal cytoplasm DK averaged one-eighth of the value in the free solution. Arrest of metabolism or injury caused an increase in DK. In muscles killed with iodoacetate, DK rose to three-quarters of the value in free solution. The data support the association-induction hypothesis.