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Selectivity of E71V under biionic conditions. (A) Raw currents were recorded with 200 mM Naint+ and 200 mM Kext+ at the indicated potentials. Traces at each potential are discontinuous. Arrows indicate the beginning of openings at −60 mV. (B) Open channel current-voltage relationship. Data are the mean from three determinations; mean ± SE are smaller than symbols. Curve through data has no theoretical meaning.
