Abstract
AbstractSome unreported characteristics of moroccan pepper virus (MPV) and tombusvirus Neckar (TVN) are given in this paper. Virus particles have a sedimentation coefficient of 140 S (MPV) and 133 S (TVN) and a buoyant density of 1.357 (TVN) and 1.355 (MPV), g/cm3 in CsCl. They are constituted by a single protein species with a molecular weight of 43,000 (MPV) and 45,000 (TVN) which encapsidate a single species of nucleic acid with the apparent size of 4,700 nucleotides. The estimated percentage sequence homology of this genomic RNA with that of the type member of the group was 10% (MPV) and 15% (TVN). All these characteristics strongly suggest to consider both MPV and TVN as true tombusviruses.
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