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Host codon usage selection pressure on Cap gene of CRESS-DNA virus evolution. (A) A, T, G, and C fraction; (B) ENc values; (C) codon usage fraction and RSCU values; (D) ENc plotted against GC3s; (E) neutrality plot analysis of the GC12 and that of the GC3; and (F) parity rule 2 (PR2)-bias plot. (Total of 1,134 nucleotide sequences of Cap gene of CRESS-DNA viruses used in this analysis.)
