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Phylogenetic trees constructed for 5′ UTR, P1, P2, and P3 regions of CV-A6-Changchun strains with other CV-A6 strains retrieved from the GenBank database. Neighbor-joining trees based on the full-length 5′ UTR (A), P1 (B), P2 (C), and P3 (D) regions were generated. All the trees were tested by bootstrapping for 1,000 replicates, and values of >70 are shown at the nodes. ●, CV-A6-Changchun isolates.
