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Repair of psoralen-induced crosslinks in cells multiply infected with SV40

✍ Scribed by Hall, Jennifer Dean

Book ID
104726591
Publisher
Springer
Year
1982
Tongue
English
Weight
417 KB
Volume
188
Category
Article
ISSN
0026-8925

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✦ Synopsis

Experiments were conducted to study the relationship between the production of interstrand crosslinks by 4,5',8-trimethylpsoralen (psoralen) in simian virus 40 DNA and the ability of psoralen to inactivate the virus. Under conditions where only single viral particles enter a given host cell, approximately one crosslink was lethal to the virus and could not be repaired. In contrast, when multiple viral genomes infected a host cell, psoralen-induced crosslinks were repaired (multiplicity reactivation). A model is proposed for multiplicity reactivation which involves genetic recombination between damaged viral genomes.

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