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a Genome organization of CaKV. b Phylogenetic tree was constructed by the neighbour-joining method with p-distances and 1000 bootstrap replicates using MEGA4.0 software (www. megasoftware.net) with an alignment of the complete amino acid sequence of polyprotein with known kobuviruses and kobu-like viruses. GenBank accession numbers are indicated. The isolate of CH-1 is marked with a square. Scale bar indicates estimated phylogenetic divergence
