Fig 2.

Molecular model of the FliI₆-FliJ ring complex. (A) Cα backbone trace of the FliI₆-FliJ complex. The FliI subunits are colored blue, violet, green, yellow, lilac, and red, and FliJ is colored cyan. (B) Model viewed from the top of panel A. (C) The eight conserved residues are labeled and highlighted in red. The FliI subunits are colored gray. (D) Binding region of FliJ for FliI. The subunit shown in violet in panel A is removed for better visualization of FliJ. Residues 13 to 24 of FliJ are shown in magenta. The region including these residues interacts with FliI.