Figure 1

Sequence LOGO showing DNA binding region of RpoEs [8]. The first 35 sequences annotated as rpoE in the NCBI database were entered into the Weblogo program (http://weblogo.berkeley.edu/) using default parameters. The red arrows indicate the residues known to bind DNA in E. coli. The residues highlighted in red on the Bdellovibrio sequences show those that align to these using the ClustalW program and indicate that these are different from most RpoEs and each other, suggesting that they may well bind to different DNA motifs. There is also a 4 residue insertion in the Bd0743 sequence relative to the other sequences.