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. 2011 Oct;138(4):393–419. doi: 10.1085/jgp.201110682

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© 2011 DiFranco and Vergara

This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 3.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/3.0/).

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Figure 2. — Sodium currents recorded in 1/2Na external solution. (A) Currents obtained after the subtraction of linear components from records obtained in response to step depolarizations to −30, −25, −20, −10, 0, 10, 30, and 50 mV (black, red, blue, green, orange, purple, dark blue, and magenta, respectively). The membrane potentials recorded by the voltage electrode are shown in the inset (same color code). Fiber parameters: radius, 28 µm; length, 410 µm; capacitance, 5 µF/cm². (B) Voltage dependence of the peak sodium currents (I_Na) for the same fiber as in A. (C) Average peak I_Na plotted as a function of the membrane potential. Data were obtained from eight fibers in 1/2Na external solutions. In B and C, the symbols are connected with straight lines.