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. 1975 Jun;122(3):1038–1044. doi: 10.1128/jb.122.3.1038-1044.1975

Fate of transforming bacteriophage HP1 deoxyribonucleic acid in Haemophilus influenzae lysogens.

J H Stuy
PMCID: PMC246157  PMID: 1080148

Abstract

The biological fate of temperate phage HP1 deoxyribonucleic acid (DNA) was followed after uptake by defectively lysogenic competent Haemophilus influenzae cultures. The similar inactivation kinetics of three single phage genetic markers and of their triple combination indicated a complete rather than partial destruction of about half of the adsorbed DNA molecules. Intracellular DNA breakdown products were tentatively identified by hydroxyapatite column chromatography as short single strands and extensively damaged short double strands. Integrated donor DNA (after single-strand insertion?) was still highly efficient for triple-marker co-transformation. This suggests that whole or nearly whole donor DNA molecules were integrated. Some donor DNA was never integrated but remained largely unaltered. This DNA fraction did not contain significant amounts of recipient prophage marker activity. It is concluded that it had not participated in some kind of reciprocal recombination event involving the recipient chromosome. Since very similar phage DNA marker inactivation rates were observed after adsorption by competent nonlysogenic recipients (transfection), the relationship between biological inactivation of adsorbed donor phage DNA and its integration in lysogenic recipients is not clear.

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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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