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. 2011 Mar 2;100(5):1207–1215. doi: 10.1016/j.bpj.2011.01.032

Figure 13.

Figure 13

Homology model of N105E-Kir1.1b, showing two adjacent subunits and a region of enhanced negative surface charge resulting from the proximity of the wt-E104 and the mutant N105E. Salt bridging between E118, R128, and E132 has been suggested to have a role in stabilizing the selectivity filter (7).