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Unrooted phylogenetic tree of the five strains used in the genome-wide analyses. This tree represents the consensus tree of 2267 gene cluster alignments used for analyses. Branches tested for positive selection are indicated as TLM1A (Test L. monocytogenes lineage IAncestral), TLM2A (Test L. monocytogenes lineage IIAncestral), and TLI/LM (Test L. innocua/L. monocytogenes).
