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. 2017 May 24;313(2):H338–H353. doi: 10.1152/ajpheart.00094.2017

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Fig. A2. — Comparison of the original and modified model of β-AR stimulation-dependent RyR2 regulation in a NZ cell, also showing traces from a NZ cell without β-AR stimulation. A, C, and E contain traces of membrane potential, free intracellular Ca²⁺, and Ca²⁺ release flux from the SR (having different x-axis) in a cell paced at a BCL of 260 ms. As the cell without β-AR stimulation manifests alternans, both alternating beats are shown. B, D, and F show the same variables but at a BCL of 400 ms, when no alternans is present.