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Charged residues in PomA and FliG characterized in this study. (A) Schematic model for residue interactions at the stator-rotor interface in the H+-driven motor as previously described (14). (B) Charged residues of PomA and FliG in the Na+-driven motor of V. alginolyticus mutated in this study. Black circles indicate residues important for the stator-rotor interaction, and gray circles indicate residues that are not important.
