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Oat chlorotic stunt virus (OCSV) is a 35 nm icosahedral plant virus comprising of a single capsid protein with a Mr of 48.2 kDa and a 4.1 kb single stranded, positive sense genomic RNA. Northern blot analysis detected a single 3′ terminal subgenomic RNA in extracts from infected plants, which was also found to be encapsidated. Virion RNA directs the synthesis of a 23 kDa polypeptide in a rabbit reticulocyte in vitro translation system. Primer extension analysis has been used to map the end of both the genomic and subgenomic RNA’s, and has shown the genomic size to be 4115 nucleotides in length. The results have enabled a model for the genome expression to be proposed. |
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