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Maximum likelihood tree of a 588 bp of the recA gene for 14 Xenorhabdus isolates from Nam Nao National Park, Phetchabun Province, Thailand (codes ending with TH), together with 23 Xenorhabdus sequences downloaded from the GenBank database. Escherichia coli (accession no. U00096.3) was used as an outgroup. Bootstrap values are based on 1,000 replicates.
