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. 2013 Jan 8;288(8):5487–5495. doi: 10.1074/jbc.M112.441964

FIGURE 7.

FIGURE 7.

Arg substitution at position 282 shifts proton apparent affinity. Shown are proton activation curves for control and mutant channels. Proton-activated currents were elicited by a drop in extracellular pH from 9.0 to solutions of lower pH. Currents were normalized to the signal obtained at pH 4.0 (n = 10–25).