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Unrooted phylogenetic tree generated from amino acid sequences of RdRp. The unrooted phylogenetic tree of the aligned sequences was constructed based on the neighbor-joining method with a 1,000 replicate bootstrap search. The alignment was carried out with the program L-INS-i of MAFFT and visualized on the Web server http://align.genome.jp/mafft/. Numbers at the nod indicate percentage of bootstrap supports from 1,000 replicates.
