Figure 1 (Left) Electronic reconstruction of particles of Rice yellow mottle virus (RYMV) and Southern cowpea mosaic virus (SCPMV) (T = 3), (Courtesy of M. Yeager). (Right) Negative contrast electron micrograph of RYMV particles stained in uranyl acetate. The bar represents 100 nm.
Figure 2 Genomic organization of five species of sobemoviruses. The lines represent the viral RNA genomes, the boxes indicate the ORFs and the numbers correspond to the nucleotide numbers for the beginning and the ending of the ORFs. The vertical lines indicate the position of serine and cysteine protease motifs and the horizontal lines indicate a polymerase conserved domain of luteoviruses. The ORF frameshift signal: UUUAAAC is positioned by a striped bar and the presence of a second ATG in ORF2b of CfMV is indicated at nt 1740.
Figure 3 Neighbor-joining dendrogram of sequence relationships among sobemovirus species. The whole-sequence alignment and dendrogram were produced using MegAlign (DNAStar program), which uses a CLUSTAL-type algorithm. Horizontal distances are proportional to sequence distances; vertical distances are arbitrary. The dendrogram was bootstrapped 100 times (percent scores shown at nodes), and rooted on a random sequence.
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