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Current-voltage and current-concentration relationships as calculated from BD. The current-voltage relationships were obtained with a symmetric concentration of 320 mM KCl, whereas the current-concentration curves were derived with the applied potential of 120 mV. The lines fitted through the data points in B are fitted with the Michaelis-Menten equation. Error bars have a length of 1 mean ± SE and are not shown when they are smaller than the data points.
