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Phylogenetic tree constructed using the maximum likelihood method based on nucleotide sequences of Rickettsia spp. from ticks, Barnaul (black diamonds), and reference sequences of the (A) ompB (427 bp), (B) htrA (450 bp), and (C) 16S rRNA (768 bp) gene fragments. The GenBank accession numbers for reference sequences are shown with the sequence name. The branch numbers indicate bootstrap support (1000 replicates). The scale bar indicates the phylogenetic distance.
