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Neighbor-joining gene tree based on the C-terminal Int280 amino acids of different intimin subtypes (amino acids 658 to 938) showing the resolutions of various intimin families. The numbers after the branches are the accession numbers in GenBank for the intimin sequences. The highlighted accession numbers represent the sequences determined in this study. The numbers at the nodes correspond to bootstrap proportions. The scale bar indicates the number of amino acid replacements per site.
