Background:The flagellar motor generates bidirectional rotation using the proteins FliG, FliM, and CheY and membrane-bound stator complexes. Results: The structures of portions of FliG and FliM in complex allow for insights into switching and structure. Conclusion: FliG MC and FliM M in a 1:1 complex may form the C-ring of the motor. Significance: Understanding motor structure is key to understanding its mechanism.
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