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SR Ca2+ content and STIM1. (A) Representative traces show the NCX currents in control and STIM1 overexpressing myocytes upon application of caffeine (10 mM). (B) SR Ca2+ content demonstrated by the integral of NCX current in A. (C) Summary data show SR Ca2+ content in control and STIM1 overexpressing myocytes. *P < 0.05 vs. control. n = 7 and 5 cells in the control and STIM1 groups, respectively.
