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. 2010 Jul;136(1):101–116. doi: 10.1085/jgp.200910380

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© 2010 Zahradníková et al.

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Figure 1. — Approximation of the calcium dependence of spark frequency. Symbols with error bars represent data on permeabilized myocytes from Lukyanenko and Györke (1999). The lines represent the best fits by Eq. 5 with parameters shown in Tables I and II for the aHTG (solid line) and HTG (dashed line) models. Both the experimental and model data were obtained at 1 mM of free Mg²⁺ in the cytosol. The abscissa shows the cytosolic calcium concentration.