Figure 1 Electron micrographs of different forms of virions of an isolate of Acidianus two-tailed virus. (Top, left) Negative contrast electron micrograph of virions in tailless form. (Top, right) Negative contrast electron micrographs of virions in two-tailed form. (Bottom) Cryo-electron micrograph of two-tailed virions at different stages of extracellular tail development. The bars represent 100 nm (A,B) and 200 nm (C).
(From Prangishvili, D. et al. (2006). J. Mol. Biol., 359, 1203–1216.)
Figure 2 Genome organization of Acidianus two-tailed virus showing location, sizes and direction of the putative genes. Colour-coded ORFs correspond to: black, virion proteins; blue, homologous ORFs present in other archaeal hyperthermophilic viruses; green, homologous ORFs occurring in conjugative plasmids of the hyperthermophilic archaeon Sulfolobus; red, transposases.
(Modified from Prangishvili, D. et al. (2006). J. Mol. Biol., 359, 1203–1216.)