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Relationships of L. cardiaca H63T with 63 other sequenced species of Legionella. In the rooted species tree, L. cardiaca is highlighted in red and the other Legionella species and their corresponding strain names appear in black. Appearing at the top of the tree are non-Legionella species (in brown) that belong to other genera within the order Legionellales. Bar, 0.1 amino acid substitutions per site.
