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Using an Agrobacterium-mediated transient assay, we screened the 15.5-kb genome of the Beet yellows virus for proteins with RNA silencing suppressor activity. Among eight proteins tested, only a 21-kDa protein (p21) was able to suppress double-stranded (ds) RNA-induced silencing of the green fluorescent protein (GFP) mRNA. Restoration of GFP expression by p21 under these conditions had no apparent...
The helper component-proteinase (HC-Pro) of Cowpea aphid-borne mosaic virus (CABMV) was expressed in Escherichia coli and used to obtain HC-Pro antiserum that was used as an analytical tool for HC-Pro studies. The antiserum was used in immunofluorescence assays to study the subcellular location of HC-Pro expressed with other viral proteins in cowpea protoplasts in a natural CABMV infection, or in...
A series of new cowpea mosaic virus (CPMV) RNA-2-based expression vectors were designed. The jellyfish green fluorescent protein (GFP) was introduced between the movement protein (MP) and the large (L) coat protein or downstream of the small (S) coat protein. Release of the GFP inserted between the MP and L proteins was achieved by creating artificial processing sites each side of the insert, either...
The jellyfish green fluorescent protein (GFP) coding sequence was used to replace the coat protein (CP) genes in a full-length cDNA clone of CPMV RNA-2. Transcripts of this construct were replicated in the presence of RNA-1 in cowpea protoplasts, and GFP expression could be readily detected by fluorescent microscopy. It was not possible to infect cowpea plants with these transcripts, but combined...
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