Fig. 1.

Coding diagrams for TVV1, TVV2, and TVV3. Open reading frames (ORFs) 1 (capsid protein (CP, red in online version of figure) and 2 (RNA-dependent RNA polymerase (RdRp), blue in online version of figure) are diagrammed for each virus. The first and last codons for each ORF are indicated. In each virus, the RdRp is thought to be expressed as a CP/RdRp fusion following ribosomal frameshifting as indicated. 5′ and 3′ untranslated regions (UTRs) are also labeled, along with the position numbers of the first and last nucleotides of each genome and ORF. The specific nucleotides and nucleotide position numbers shown in this figure as well as in Fig. 2 are for the prototypical strains TVV1-1 [51], TVV2–1 [10], and TVV3–1 [9].