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Fig. 2. Effect of isoproterenol (ISO) on SR Ca2+ uptake. (A)
INCX elicited by 10 mmol l1 Caffeine after a
preceding 10 s depolarization to 70, 30 or 10 mV in the
absence (CON) and the presence of 1 µmol l1 ISO. (B) Time
integrals of the currents in A. The experimental conditions are indicated
above each trace and the time scale bar corresponds to 5 s.