Figure 2.
Phylogenetic tree (Chladogram) of chromosomal RelE, HigB and ParE toxins from enteric bacteria. The RelE, HigB and ParE sequences were retrieved from Table S2 (as GIs) and Table S3 (raw sequences). For comparison, one plasmid-encoded toxin homolog from each group was included in the analysis (RelE of P307, HigB of Rts1 and ParE of RK2). The tree was calculated using Clustal W version 1.83. The lengths of the horizontal lines indicate relative evolutionary distances. A scale bar is also shown.