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Phylogenetic unrooted tree showing relationships among the sodAint fragments from various streptococcal type strains. The tree was established from an analysis of the sequences listed in Table 1 by using the neighbor-joining method (26). The value on each branch is the estimated confidence limit (expressed as a percentage) for the position of the branch as determined by bootstrap analysis. The scale bar (neighbor-joining [NJ] distance) represents 10% differences in nucleotide sequences.
