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[Effect of the polymerase activity of DNA polymerase I on the development of moderate bacteriophages Mu, lambda red- and lambda red-gam-. II. The effect of the polymerase activity of DNA polymerase I on the development of bacteriophage Mu].
The paper reports on the influence of polymerizing activity of DNA-polymerase I on different developmental stages of temperate bacteriophage Mu in Escherichia coli K-12 cells. This activity is shown to be necessary for optimization of phage Mu primary integration into cell chromosomes. The relative frequency of Mu integration into bacterial chromosomes is 5-6 times lower in polA cells than in isogenic polA+ control strains, the phage yield from cells being delayed during the phage infectious development, but not in the course of induction from the prophage state. Data have been obtained that show the process of phage Mu DNA integration into the plasmid pRP1 .2 and the process of Mu transposition from the cell chromosome into the plasmid to be independent of the polymerizing activity of DNA-polymerase I.
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