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. 1972 Sep;10(3):425–432. doi: 10.1128/jvi.10.3.425-432.1972

Fate of Infecting Simian Virus 40-Deoxyribonucleic Acid in Nonpermissive Cells: Integration into Host Deoxyribonucleic Acid

Carolyn J Collins 1, Gerhard Sauer 1
PMCID: PMC356482  PMID: 4342050

Abstract

Nonpermissive 3T3 cells were infected with purified superhelical simian virus 40 (SV40) deoxyribonucleic acid I (DNA I). One hour after infection, approximately 60% of the intracellular SV40 DNA was converted to relaxed forms. One day after infection, all intracellular SV40 DNA was present as slow-sedimenting material, and no SV40 DNA I was detectable. At 2 days after infection there appeared viral DNA sequences cosedimenting with cellular DNA during alkaline velocity centrifugation. Furthermore, by both alkaline equilibrium gradient centrifugation and by DNA-ribonucleic acid hybridization analysis, covalent linkage of viral DNA sequences to cellular DNA was demonstrated. Integration of SV40 DNA into cellular DNA did not appear to require DNA synthesis, although DNA synthesis followed by mitotic division of the cells enhanced the amount of viral DNA integrated. Based on data obtained by two different methods, it was calculated that 1,100 to 1,200 SV40 DNA equivalents must be integrated per cell by 48 hr after infection.

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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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