FIG 1.

Maximum-likelihood phylogeny of 399 A. baumannii AceI orthologs. Taxa are grouped to higher-order systematic groups where applicable to facilitate a better overview. The two focal clades, Acinetobacter spp. and P. aeruginosa, are shown in bold face. Branch labels indicate percent bootstrap support, and branch lengths are not drawn to scale. Node labels indicate the species or, alternatively, the higher-order systematic group together with the number of species subsumed in the group. RefSeq protein accession numbers are given next to the species name. The background of the node labels indicates the bacterial class, as follows: gray, Gammaproteobacteria; orange, Betaproteobacteria; green, Epsilonproteobacteria; white, Proteobacteria. The fully expanded tree, together with branch length information, is shown in Fig. S1.