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Journal of Virology logoLink to Journal of Virology
. 1972 Nov;10(5):1010–1020. doi: 10.1128/jvi.10.5.1010-1020.1972

Properties of a Ribonucleoprotein Particle Isolated from Nonidet P-40-Treated Rous Sarcoma Virus

Nancy L Davis 1, Roland R Rueckert 1
PMCID: PMC356572  PMID: 4344250

Abstract

A ribonucleoprotein particle containing about 20% ribonucleic acid (RNA), and containing little if any phospholipid or glucosamine, was recovered in high yield after treatment of Schmidt-Ruppin strain of Rous sarcoma virus and B77 virus with the nonionic detergent Nonidet P-40. This structure, which probably derives from the internal ribonucleoprotein filament described in electron microscopy studies, contained 80 to 90% of the viral 60 to 70S RNA and only about 10% of the protein present in intact virions. It sedimented in glycerol density gradients at approximately 130S and had a buoyant density in sucrose of about 1.34 g/ml. Studies with 32P-labeled virus indicated that the ribonucleoprotein particle contained approximately 30 4S RNA molecules per 107 daltons of high-molecular-weight viral RNA. Intact virions contained about 70 4S RNA molecules per 107 daltons of high-molecular-weight RNA. Electrophoretic studies in dodecyl sulfate-containing polyacrylamide gels showed that the ribonucleoprotein particle contained only 5 of the 11 polypeptides found in the virion; of these the major component was a polypeptide weighing 14,000 daltons.

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Selected References

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