Figure 1 Negative contrast electron micrograph of particles of Potato mop-top virus (PMTV). The gold-labelling shows the binding of monoclonal antibody SCR 68 to one extremity of the particles. The bar represents 100 nm. (Courtesy I. M. Roberts; from Virology 203: 277, 1994, with permission.)
Figure 2 Genome organization of Beet soil-borne virus (BSBV). Areas in the putative translation products indicate respectively the UAA and UAG stop codons that are thought to be suppressible, and solid squares indicate a 3-terminal tRNA-like structure. Dark areas indicate conserved motifs. Hel; helicase, Mt; methyltransferase, RdRp; RNA dependent RNA polymerase, RT; readthrough.
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