Fig. 1

Role of Lrp superimposed on core genome phylogeny. Five orders of the γ-Proteobacteria are shown, adapted (with permission) from a maximum likelihood tree generated by Gao et al. [8], and based on the concatenated sequences of 36 highly-conserved proteins. They used both maximum parsimony (MP) and maximum likelihood (ML) approaches, and the two numbers are the proportion of the puzzling quartets (ML)/% bootstrap scores (MP) that supported the given node. For each order, the colored shading and text to the right indicates the role played by Lrp in tested species (green = global, pink = local), and the tested species are also indicated. For two orders, indicated by “?” and yellow shading, the role of Lrp has not yet, to our knowledge, been tested