FIG 5.

A flagellar motor structure lacking the hook and filament. (A) A central section of the flagellar motor structure shows the outer membrane (OM) with significant deformation. (B) A cross-section view of the motor reveals 18-fold symmetric features. A side view (C) and a cut-in view (D) of the motor. The cage-like structure surrounds the rotor. The following color scheme is the same as that in Fig. 4: yellow, cage; orange, stator; green, membranes; blue, rod and MS ring; cyan, C ring; and dark blue, export apparatus.