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. 1998 Nov 2;143(3):767–775. doi: 10.1083/jcb.143.3.767

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Sample traces and amplitude histograms obtained from the same patch without (A and B) or with (C and D) 5 mM NaCl added to the intracellular side, at either 0 (A and C) or +80 mV (B and D). The single channel currents are obtained from the fit to a Gaussian distribution. The smaller amplitude in the histograms at +80 mV corresponds to the amplitude of the flickering of the channel, and remains constant in the absence (B) or in the presence (D) of Na⁺.