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Phylogenetic tree of GyrA and ParC sequences from T. whipplei and various representative species of the domain Bacteria. Protein sequences were aligned by using the ClustalW program from the Pôle BioInformatique Lyonnais (Lyon, France). The tree was constructed with MEGA software (version 2.1) by the neighbor-joining methodology (amino acid p-distance, including site, complete deletion, and bootstrap testing).
