Figure 4.

Phylogenetic distribution of PA sigma factors in the Bc species-group. Sigma factors genes found in fewer than all of the genomes listed in Table 1, mapped on a Bc species-group cladeogram similar to that shown in Figure 2. The five Ba strains in Table 1 have a gene content identical to strain Ba strain Sterne, and so are condensed to one line in this tree. A + indicates the presence of a gene, as listed in the column heading, in that genome. Genome abbreviations are as found in Table 1.

Schmidt et al. BMC Genomics 2011 12:430   doi:10.1186/1471-2164-12-430
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