Figure 6
Model diagram of the suggesting association of FliL and stator-units. (A) The central circle is a rotor of a BFM. The blue square is a stator-unit. And the green twin circle represents FliL. They diffuse independently in the membrane pool. The circle and square with the dashed line around the rotor represent the possible position for FliL or stator-unit binding. (B) A stator-unit close to the rotor and activated by interacting with BFM. (C) The plug of stator-unit activation enables rotor to recruit a FliL. A FliL divided from the complex and bind to the rotor. (D) While a stator-unit leaves the rotor, the FliL would lose its stability and disengage from the rotor after the stator-units.
