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Fig. 3. Steady-state activation (A) and inactivation (B) curves of calcium channels
in control and after 5 min of perfusion with 30 µmol l1
OA. Current amplitude were normalised to maximum current and plotted against
holding potential. Data were fit using the appropriate form of the Boltzmann
equation (see Materials and methods). Individual ventricular myocytes used for
inactivation and activation curves were respectively three and 11 for control
and four and nine for 30 µmol l1 OA.