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. 1981 Jul;147(1):1–8. doi: 10.1128/jb.147.1.1-8.1981

SP02 particles mediating transduction of a plasmid containing SP02 cohesive ends.

R Marrero, F A Chiafari, P S Lovett
PMCID: PMC216000  PMID: 6787022

Abstract

SP02 particles that mediate transduction of plasmid pPL1010, a 4.6-megadalton derivative of pUB110 containing an Eco RI endonuclease-generated fragment of SP02 deoxyribonucleic acid that spans the cohesive ends, exhibit three unusual features: the transducing particles have a lower buoyant density than infectious particles; the transduction of pPL1010 occurs at high efficiency; and the transducing activity of the particles is relatively resistant to ultraviolet irradiation when the recipient is recombination proficient. Evidence is presented which indicates that SP02(pPL1010) particles carry the plasmid predominantly as a linear multimer having a molecular mass comparable to that of infectious SP02 deoxyribonucleic acid (ca. 31 megadaltons). The plasmid monomers in the linear multimer appear oriented in the same polarity. The buoyant density difference between infectious and transducing particles appears to be due mainly to the buoyant density difference between pPL1010 (1.699 g/cm3) and SP02 deoxyribonucleic acid (1.702 gm/cm3).

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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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