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. 1983 Dec;48(3):721–730. doi: 10.1128/jvi.48.3.721-730.1983

Protease-sensitive transfection of Streptococcus pneumoniae with bacteriophage Cp-1 DNA.

C Ronda, R López, A Gómez, E García
PMCID: PMC255404  PMID: 6355506

Abstract

The transfecting activity of pneumococcal phage Cp-1 DNA was destroyed by treatment with proteolytic enzymes, although these enzymes did not affect transfection with bacteriophage Dp-4 DNA. This transfection was stimulated by calcium ions. Protease-treated Cp-1 DNA competes for binding and uptake with transforming pneumococcal DNA as well as with transfecting Dp-4 DNA to approximately the same extent as does untreated Cp-1 DNA. In addition, [3H]thymidine-labeled Cp-1 DNA, treated with proteases or untreated, was absorbed with the same efficiency. These data suggest that uptake of Cp-1 DNA is not affected by protease treatment. [3H]thymidine-labeled Cp-1 DNA showed remarkable resistance against surface nuclease activity of competent wild-type cells. The monomeric form of the Cp-1 DNA-protein complex showed a linear dose response in transfection.

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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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