A. Two alpha helices in the N-terminal domain form a coiled coil, and two additional alpha helices in the C-terminal domain form a second coiled coil. These two coiled coils provide the majority of the dimerization interface.
B. A monomer of TraR with the amino acid residues that were mutated in this study.
C. Helical wheel projection of alpha helix 9 and alpha helix 13. Residues depicted in black were altered by site-directed mutagenesis in this study. Positions a to g of the helical wheel projection are encircled and labeled with lower case letters.