Figure 1.

Consensus unrooted trees generated by the Neighbor-Joining distance method for the RecA (A) and for the LexA proteins (B). The circles highlight the main groups of bacteria. The symbol * indicates the beta proteobacteria. Some groups of bacteria included in (A) which are absent in the other trees: Spirochaetales: TREPA: Treponema pallidum (gi| 7443874), BORBU: Borrelia burgdorferi (gi| 15594476); Chlamydiales: CHLTR Chlamydia trachomatis (gi| 7443880), CHLPN: Chlamydophila pneumoniae CWL029 (gi| 7443883). The homologs of X. axonopodis and X. fastidiosa are indicated inside the square boxes.