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Diagrammatic representation of PVX.GFP and six mutant derivatives. The 12FS mutation interferes with expression of a region of the 12K ORF, as indicated by the shaded box. Mutations converting a methionine start codon to an isoleucine codon are indicated above the 12K ORF of mutants 12I and 12ID. Nucleotide sequence insertions in the 12STOP and 12KOZ mutants are also indicated above the 12K ORF. Deletions in mutants 12D and 12ID are indicated by gaps in the 12K ORF.
