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. 1999 Jul 1;114(1):55–70. doi: 10.1085/jgp.114.1.55

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© 1999 The Rockefeller University Press

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).

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ATP dependence of the relaxation rates. The rate constants of the fast relaxing component seen upon addition (▪) and withdrawal (○) of the indicated amount of ATP by rapid solution exchange are plotted against ATP concentration. Data represent the means ± SD of at least three independent measurements. All values are normalized to rates measured with 500 μM ATP in the respective experiment; i.e., giant patch. The average of these standard relaxation rates is 1.2 ± 0.4 s−¹ for the current rise after ATP addition and 0.8 ± 0.4 s⁻¹ for the current decay after ATP removal. Also included are two different fits to the rates upon ATP addition according to the equation (broken line): .

Inline graphic — ATP dependence of the relaxation rates. The rate constants of the fast relaxing component seen upon addition (▪) and withdrawal (○) of the indicated amount of ATP by rapid solution exchange are plotted against ATP concentration. Data represent the means ± SD of at least three independent measurements. All values are normalized to rates measured with 500 μM ATP in the respective experiment; i.e., giant patch. The average of these standard relaxation rates is 1.2 ± 0.4 s−¹ for the current rise after ATP addition and 0.8 ± 0.4 s⁻¹ for the current decay after ATP removal. Also included are two different fits to the rates upon ATP addition according to the equation (broken line): .