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. 1975 Jun;15(6):1367–1377. doi: 10.1128/jvi.15.6.1367-1377.1975

Recombination between endogenous and exogenous RNA tumor virus genes as analyzed by nucleic acid hybridization.

W S Hayward, H Hanafusa
PMCID: PMC354604  PMID: 167190

Abstract

Certain chicken cells that do not spontaneously release virus particles have been shown to produce a subgroup E avian RNA tumor virus, Rous-associated virus 60 (RAV-60), after infection with viruses of other subgroups. The nucleic acids of RAV-60 were analyzed for sequence homologies with the viral nucleic acids contained in the uninfected cell and with those of RAV-2, the exogenous virus used for the preparation of this particular RAV-60 isolate. In addition, these nucleic acids were compared with those of RAV-0, an endogenous virus spontaneously released from line 100 chicken cells. RAV-60 appears to be intermediate between RAV-0 and RAV-2 in its genetic composition, based on the pattern of hybridization obtained with the nucleic acids of these viruses and on the melting profiles of the various hybrid combinations. Of the three viruses tested, RAV-0 appears to have the greatest sequence homology with the viral nucleic acids of the uninfected cell. Hybridization between RAV-60 3-H-labeled complementary DNA and either DNA or RNA from the uninfected cell indicates that RAV-60 contains some nucleic acid sequences which are not present in the cell. In addition, some RAV-60 sequences which hybridize with the cell nucleic acid contain significant amounts of mismatching, as indicated by the lower thermal stability of these hybrid duplexes. Hybrid formation between these partially homologous sequences was excluded under stringent annealing conditions. The data indicate that RAV-60 is a recombinant between exogenous and endogenous viral genes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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