Orentlicher M, Brandt PW, Reuben JP. Regulation of tension in skinned muscle fibers: effect of high concentrations of Mg-ATP.
THE AMERICAN JOURNAL OF PHYSIOLOGY 1977;
233:C127-34. [PMID:
411376 DOI:
10.1152/ajpcell.1977.233.5.c127]
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Abstract
The control of tension in skinned fibers by Mg-ATP and Ca described in previous publications has been studied at high substrate concentrations over a wide range of temperature and salt concentration. Curves of tension versus pCa shift systemically to the right as [Mg-ATP] increases. The maximum Ca-activated tension of a skinned fiber declines at sufficiently high substrate concentrations. This behavior is described by a generalization of the scheme given in the earlier reports.
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