Discovery of the First Insect Nidovirus, a Missing Evolutionary Link in the Emergence of the Largest RNA Virus Genomes

Abstract excerpt

Nidoviruses with large genomes (26.3-31.7 kb; 'large nidoviruses'), including Coronaviridae and Roniviridae, are the most complex positive-sense single-stranded RNA (ssRNA+) viruses. Based on genome size, they are far separated from all other ssRNA+ viruses (below 19.6 kb), including the distantly related Arteriviridae (12.7-15.7 kb; 'small nidoviruses'). Exceptionally for ssRNA+ viruses, large nidoviruses encode...

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