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. 2011 Mar 14;108(13):5272–5277. doi: 10.1073/pnas.1014186108

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Fig. 3. — WT KcsA, but not E71A, becomes nonconductive in the absence of K⁺ and the presence of Na⁺. (A) Time courses of WT fluxes at pH 7, showing K⁺-driven uptake (black), K⁺-driven uptake (blue), and Na⁺-driven uptake (orange) (n = 3, mean ± SEM). (B) Same as A except for E71A (n = 3, mean ± SEM).

Inline graphic — WT KcsA, but not E71A, becomes nonconductive in the absence of K⁺ and the presence of Na⁺. (A) Time courses of WT fluxes at pH 7, showing K⁺-driven uptake (black), K⁺-driven uptake (blue), and Na⁺-driven uptake (orange) (n = 3, mean ± SEM). (B) Same as A except for E71A (n = 3, mean ± SEM).