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Phylogenetic tree for the G12 VP7 genes constructed by the neighbor-joining method. The horizontal distance connecting two VP7 sequences is proportional to the genetic distance between these two VP7 sequences. The distance is expressed as the number of the nucleotide substitutions per site. Strain Wa (G1P[8]) was used as an outgroup. The bootstrap probabilities equal or greater than 800 after 1,000 replications are provided at each branching point.
