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. 1970 Aug;6(2):149–155. doi: 10.1128/jvi.6.2.149-155.1970

Degradation of Escherichia coli B Deoxyribonucleic Acid After Infection with Deoxyribonucleic Acid-Defective Amber Mutants of Bacteriophage T7 1

Paul D Sadowski 1,2, Carol Kerr 1
PMCID: PMC376101  PMID: 4925772

Abstract

The degradation of bacterial deoxyribonucleic acid (DNA) was studied after infection of Escherichia coli B with DNA-negative amber mutants of bacteriophage T7. Degradation occurred in three stages. (i) Release of the DNA from a rapidly sedimenting cellular structure occurred between 5 and 6 min after infection. (ii) The DNA was cleaved endonucleolytically to fragments having a molecular weight of about 2 × 106 between 6 and 10 min after infection. (iii) These fragments of DNA were reduced to acid-soluble products between 7.5 and 15 min after infection. Stage 1 did not occur in the absence of the gene 1 product (ribonucleic acid polymerase sigma factor), stage 2 did not occur in the absence of the gene 3 product (phage T7-induced endonuclease), and stage 3 did not occur in the absence of the gene 6 product.

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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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