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Dendrogram depicting the phylogenetic location of the Helicobacter spp. constructed on the basis of 16S rRNA sequence similarity values. The sequences from the beluga whale (isolates MIT 00-7128 and MIT 00-7129) are identified with arrows. The number in parentheses following the MIT accession number is the GenBank accession number. The scale bare is equal to a 2% difference in nucleotide sequences as determined by measuring the lengths of the horizontal lines connecting two species.
