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| Content Provider | PubMed Central |
|---|---|
| Author | Channa, Shalitin Naot, Yehudith |
| Abstract | In an attempt to establish whether Escherichia coli B infected with N130 (an amber mutant defective in gene 46) is recombination-deficient, the postinfection fate of 14C-labeled N130 parental deoxyribonucleic acid (DNA) was followed, its amount in complex with the host cell membrane being determined in sucrose gradients after mild lysis of the infected cells. The parental DNA was found to undergo gradual detachment from the membrane during infection. Pulse-chase experiments similarly showed that newly synthesized DNA is normally attached to the host cell membrane and is detached by endonucleolytic breakage at a late stage of infection. The conclusion is that only attached DNA molecules are replicated by membrane-bound replicase, whereas those detached by endonucleolytic breakage are not. It thus seems that the gene 46 product controls the activity of a nuclease whose main function is recombination of DNA nicked by endonuclease, thereby attaching it to the host cell membrane. The rate of T4 DNA synthesis is apparently governed by the efficiency of recombination. Supporting evidence was found in experiments with the double mutant N130 × N134 (genes 46, 33). |
| Starting Page | 142 |
| File Format | |
| ISSN | 10985514 |
| e-ISSN | 10985514 |
| Journal | Journal of Virology |
| Issue Number | 2 |
| Volume Number | 8 |
| Language | English |
| Publisher Date | 1971-08-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Virology Immunology Microbiology Insect Science |
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