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. 1976 Jun;18(3):873–884. doi: 10.1128/jvi.18.3.873-884.1976

Absence of interparental recombination in multiplicity reconstitution from incomplete bacteriophage T4 genomes.

A W Kozinski, A H Doermann, P B Kozinski
PMCID: PMC354786  PMID: 1271533

Abstract

Interparental recombination between injected T4 DNA molecules is indetectable for incomplete petite phages (carrying a terminally deficient genome and therefore unable to circularize) as well as for genetically complete phages. The nonvialbe petite phages can individually replicate their DNA repeatedly, and they aso undergo multiplicity reconstitution, producing complete phages, provided that a host bacterium is infected by several petite particles that carry genetically complementary segments of DNA. The formation of complete phages in multiplicity reconstitution must be due to recombination among incomplete progeny fragments, i.e., partial replicas of the T4 genomes. It evidently does not result from interparental recombination. To test for interparental recombination, light bacteria (containing no bromouracil) were simultaneously infected in light medium with light radioactive phage in minority (usually less than one per cell) and heavy (bromouracil-labeled) phage in majority (usually about nine per cell). Any interparental recombination should, under these circumstances of infection, head to movement of the radioactive label of the minority light phage DNA to a position of higher density. That possibility was not observed.

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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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