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  • Title: Analysis of the dsRNAs of apple chlorotic leaf spot virus.
    Author: German S, Candresse T, Le Gall O, Lanneau M, Dunez J.
    Journal: J Gen Virol; 1992 Apr; 73 ( Pt 4)():767-73. PubMed ID: 1634872.
    Abstract:
    Double-stranded RNAs were isolated from plants infected with five different isolates of apple chlorotic leaf spot virus (ACLSV). Analysis by PAGE and by Northern blot hybridization showed that six major species of viral dsRNA of approximately 7.5, 6.4, 5.4, 2.2, 1.1 and 1.0 kbp can be detected in infected plants, irrespective of the ACLSV isolate used. In addition to the dsRNA of 7.5 kbp corresponding to the full-length genome, the size and position on the genome of the 2.2 and 1.1 kbp species indicate that these are very probably double-stranded forms of subgenomic RNAs allowing the expression of the internal open reading frames coding respectively for the ACLSV 50K and coat proteins. The subgenomic messenger for the coat protein was indeed detected in total RNA preparations from infected plants. Surprisingly, the two most abundant dsRNA species, of 6.4 and 5.4 kbp, were found to be 5'-coterminal with the genomic RNA. A model for the expression of the genome of ACLSV and for the production of the molecules 5'-coterminal with the genomic RNA is presented.
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