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. 1978 Sep;27(3):595–603. doi: 10.1128/jvi.27.3.595-603.1978

Structural studies on Rauscher murine leukemia virus: isolation and characterization of viral envelopes.

W J van de Ven, A J Vermorken, C Onnekink, H P Bloemers, H Bloemendal
PMCID: PMC525847  PMID: 702639

Abstract

A preparative method for isolating pure viral envelopes from a type-C RNA tumor virus, Rauscher murine leukemia virus, is described. Fractionation of virions of Rauscher murine leukemia virus was studied after disruption of the virions with the detergents sodium dodecyl sulfate of Nonidet P-40 in combination with ether. Fractionation was performed through flotation in a discontinuous sucrose gradient and, as appeared from electron microscopic examination, a pure viral envelope fraction was obtained in this way. By use of sensitive competition radioimmunoassays or sodium dodecyl sulfate-polyacrylamide gel electrophoresis after immunoprecipitation with polyvalent and monospecific antisera directed against Rauscher murine leukemia virus proteins, the amount of the gag and env gene-encoded structural polypeptides in the virions and the isolated envelope fraction was compared. The predominant viral structural polypeptides in the purified envelope fraction were the env gene-encoded polypeptides gp70, p15(E), and p12(E), whereas, except for p15, there was only a relatively small amount of the gag gene-encoded structural polypeptides in this fraction.

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Selected References

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