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Phylogenetic relationships of various species of VGS, S. pneumoniae, and S. pyogenes based on the nucleotide sequences of the groES and groEL genes. The phylogenetic tree was generated by the neighbor-joining method within the MEGA package. The numbers at the nodes are the percentages of occurrence in 500 bootstrapped resamplings. (A) Phylogenetic tree showing relationships of groES genes; (B) phylogenetic tree showing relationships of groEL genes.
