Figure 1 (Top left) Image reconstruction of a particle of cowpea chlorotic mottle virus (CCMV) (genus Bromovirus), showing pentamer and hexamer clustering in a T=3 quasi-icosahedron (from Lucas et al. (2001). J. Mol. Biol., 317, 95-108). (Top central) schematic representation of a T=3 particle; (top right) negative contrast electron micrograph of particles of cucumber mosaic virus (CMV) (genus Cucumovirus) (courtesy of G. Kasdorf). (Bottom left) Electron density representation of a Ta particle of alfalfa mosaic virus (AMV) (genus Alfamovirus), showing T=1 structure (from Kumar et al. (1997). J. Virol., 71, 7911-7916). (Bottom center) Schematic representation of a T=1 particle. (Bottom right) Negative contrast electron micrograph of particles of prune dwarf virus (PDV) (genus Ilarvirus) (courtesy of G. Kasdorf). The bars represent 100 nm.
Figure 2 Schematic genome organization for members of the family Bromoviridae.