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Science 29 July 1983:
Vol. 221. no. 4609, pp. 464 - 466
DOI: 10.1126/science.6867722
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Articles

Science, Vol 221, Issue 4609, 464-466
Copyright © 1983 by American Association for the Advancement of Science

articles

Calcium-dependent stress maintenance without myosin phosphorylation in skinned smooth muscle

M Chatterjee and RA Murphy

Stress development depended on calcium-stimulated myosin phosphorylation in an arterial smooth muscle preparation in which the concentration of calcium was controlled. However, developed stress was maintained at a concentration of calcium that did not support phosphorylation. These results, in conjunction with other evidence, suggest that the interaction of two regulatory mechanisms with different calcium sensitivities regulate both stress and the rate and energetics of contraction.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Ca2+ influx inhibits voltage-dependent and augments Ca2+-dependent K+ currents in arterial myocytes.
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Effect of Mg2+ on stress, myosin phosphorylation, and ATPase activity in detergent-skinned swine carotid media.
X. Su, J. W. R. Pott, and R. S. Moreland (1999)
Am J Physiol Heart Circ Physiol 276, H1416-H1424
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Cyclic GMP Causes Ca2+ Desensitization in Vascular Smooth Muscle by Activating the Myosin Light Chain Phosphatase.
M. R. Lee, L. Li, and T. Kitazawa (1997)
J. Biol. Chem. 272, 5063-5068
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