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Voltage-dependent effect of APETx4 on hERG inward tail currents. (A) Normalized inward tail currents were plotted versus the applied pulse potentials (mV) in control (●) and toxin condition (○). The data points were fitted with the Boltzmann equation. (B) The inhibited current (%) observed after 10 µM APETx4 addition was plotted versus the applied pulse potentials.
