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Neighbor-joining dendrogram depicting phylogenetic relationships based on nearly complete 16S rDNA sequences among swine isolates 2-9, 7-11, and 4-13 and selected members of the Veillonella parvula subgroup. GenBank accession numbers are in parentheses. Nucleotide differences are determined by the sum of the horizontal lines connecting the organisms. The scale bar represents a 5% difference in nucleotide sequence.
