Genetic analysis of bacteriophage T4 transducing bacteriophages.
Mutations in the genes for nuclear disruption (ndd), endonuclease IV (denB), and the D1 region of the T4 genome are essential for converting bacteriophage T4 into a generalized transducing phage. These mutations gave rise to a very low frequency of transduction, about 10(-8) per infected bacterium. The addition of an rII mutation raised the transduction frequency about 20-fold. An additional 100-fold increase in the transduction frequency was observed with mutations in genes 42, 56, and alc. High-frequency generalized transduction by T4 results from the cumulative effect of these mutations.
11 references, click to expand
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