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Biophysical Journal 45: 1125-1133 (1984)
© 1984 the Biophysical Society

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Unidirectional calcium and nucleotide fluxes in sarcoplasmic reticulum. I. Interpretation of flux ratios for different reaction schemes.

J J Feher

ABSTRACT

The relation between unidirectional calcium and nucleotide fluxes was examined for different ATPase reaction schemes of the sarcoplasmic reticulum. The schemes considered differed in the order of sorption and desorption of calcium, ATP, and ADP. The results suggest that the theoretical relation between calcium and nucleotide fluxes depends on the reaction scheme and that experimental measurements can distinguish among them. The results obtained are generally valid and do not depend on assumptions of equilibrium or pseudoequilibrium between intermediate states of the pump.




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T. R. Shannon, F. Wang, J. Puglisi, C. Weber, and D. M. Bers
A Mathematical Treatment of Integrated Ca Dynamics within the Ventricular Myocyte
Biophys. J., November 1, 2004; 87(5): 3351 - 3371.
[Abstract] [Full Text] [PDF]


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Copyright © 1984 by the Biophysical Society.