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. 1974 May;13(5):960–966. doi: 10.1128/jvi.13.5.960-966.1974

Transfection of Escherichia coli Spheroplasts IV. Transfection of rec+ and rec− Spheroplasts by Native, Denatured, and Renatured T5 Bacteriophage DNA After Repair of Single-Strand Breaks by Polynucleotide Ligase

R Benzinger 1, P Scheible 1
PMCID: PMC355402  PMID: 4596299

Abstract

Transfection of Escherichia coli spheroplasts by native T5 phage DNA was not affected by treatment with polynucleotide ligase. Denatured T5 phage DNA infectivity, only 0.1% of the native DNA level, was increased slightly by polynucleotide ligase treatment. Renatured T5 phage DNA infectivity was also increased slightly by polynucleotide ligase treatment. To form an infective center with rec+ spheroplasts, 1.6 to 2.1 native T5 phage DNA molecules were required; however, 1.4 T5 phage DNA molecules were required to form an infective center with recA−B− spheroplasts, and one molecule was sometimes sufficient for rec B− spheroplasts. Polynucleotide ligase treatment of T5 phage DNA had no effect on these parameters. Thus, the single-strand interruptions of T5 phage DNA are probably not essential to the survival of the parental T5 phage DNA, and T5 phage DNA, especially the denatured form, is highly sensitive to some nucleases in E. coli spheroplasts.

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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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