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Science 9 June 1972:
Vol. 176. no. 4039, pp. 1137 - 1139
DOI: 10.1126/science.176.4039.1137
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Articles

Cooperative Critical Thermal Transition of potassium Accumulation in Smooth Muscle

Ignacio L. Reisin 1 and Jagdish Gulati 1

1 Department of Molecular Biology, Pennsylvania Hospital, Philadelphia

The steady-state levels of potassium and sodium of taenia coli of guinea are critically affected by varying temperature in the narrow range 12° to °C. For the accumulation of both cations the critical temperature, Tc, is 13.8°C the presence of millimolar external potassium. The value of Tc, decreases 10.0°C when the external potassium is raised to 10 millimolar. Since, at a fixed Temperature, the potassium accumulation follows a cooperative mechanism, the results are compared with the quantitative predictions of this approach. The itical thermal transition behavior can be described in terms of the cooperative cumulation process.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Potassium and Sodium in Frog Muscle.
J. Gulati and I. L. Reisin (1972)
Science 176, 1139-1141
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