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Nucleotide and amino acid substitutions in the genomes of SA compared with the sequences of OM. The PV genome is shown at the top of the panel. P1 denotes the viral capsid protein region. P2 and P3 denote the viral non-capsid protein regions. UTR, untranslated region of RNA. Nucleotide and amino acid differences between OM (closed boxes) and SA (open boxes) are indicated in boldface.
