1887

Abstract

A transducing phage, SE1, which is able to infect was isolated from a strain. SE1 is a temperate phage which is heteroimmune with respect to phages P22, L, KB1 and ES18. It is similar in morphology and size to phages P22, L and KB1 and is serologically related to phages P22 and L but not to KB1. Efficiencies of generalized transduction effected by phage SE1 are similar to those for P22HT (), a mutant which mediates a high frequency of chromosomal gene transduction. The lengths of chromosomal DNA transduced by SE1 and P22HT () are similar. Furthermore, the SE1 prophage does not exclude the transducing particles from cells it has lysogenized; consequently it is possible to use both SE1 lysogens and non-lysogenic strains as recipients in SE1-mediated transduction experiments, and obtain similar transduction efficiencies. However, the SE1 prophage gives rise to a lysogenic conversion that decreases the rate of adsorption of SE1 and L phages by about 50%, but does not affect adsorption of P22. Altogether these results suggest that phage SE1 may be a useful tool in the genetic manipulation of .

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/content/journal/micro/10.1099/00221287-132-4-1035
1986-04-01
2021-08-05
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