Figure 1 (Left) Diagram of the proposed structure of luteovirus particles. (Center) Negative contrast electron micrograph of particles of barley yellow dwarf virus-PAV (BYDV-PAV) and (right) pea enation mosaic virus-1 (PEMV-1), isolated by means of sucrose density gradient centrifugation and stained with uranyl acetate. Bars represent 100 nm.
Figure 2 Diagram of the genome organization and map of the translation products typical of viruses in each genus of the family Luteoviridae. Solid lines represent RNA; boxes represent ORFs; thinner boxes represent translation products; grey ovals represent VPgs.
Figure 3 Phylogenetic analyses of the (left) readthrough protein (ORFs 3 and 5) and (right) polymerase (ORF2) sequences of representatives of species in the family Luteoviridae. Amino acid sequences were aligned with CLUSTALX and neighbour-joining trees constructed with MEGA 4. Bootstrap values above 50% are indicated.