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Structural comparisons between 3USY (cyan) and 3USW (magenta) structures of Helicobacter pylori FliG. Conformational rearrangements of the conserved MFXF motif induces a 180° rotation of FliGCC relative to FliGCN to reorient Arg-293 and Glu-300 residues, which correspond to Arg-281 and Asp-289 of E. coli FliG, respectively.
