Figure 2. The 3′ uridine tails are present in diverse positive-strand RNA viruses.

The tails associated with viral RNAs were detected from the CMV-, TRV-, PVX- and PVY-inoculated N. benthamiana leaves, the FgHV2-infected F. graminearum, the PEDV-infected Vero cells, or the PRRSV-infected MARC-145 cells (A–G). Nucleotide compositions of the 3′ tails are shown, and vertical dashed lines with numbers indicate positions of the tails on viral genomes.