Abstract
AbstractA new tombusvirus cleariy distinguishable from other members of the group was isolated in Apulia from river Lato and therefore referred to as Lato River Tombusvirus (LRV). Purified virus preparations after storage for 5 months at 4°C in 20 mM phosphate buffer, pH 7.2, contained variable amounts of small particles (c. 17 nm in diameter) in addition to typical virus particles (c. 30 nm in diameter). LRV small particles were constituted by a single protein species with a tnol. wt of 29,000, did not contain nucleic acid and were not infective but proved to be serologically undistinguishable from ordinary virus particles. Attempts to artificially produce small particles by chemical orenzymatic treatments of full size LRV virions failed but their spontaneous production nder particularstorage conditions seems to be a remarkable feature of this virus as it does not occur with other definitive tombusviruses.
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