Summary
Non-modified DNAs from phages SPO2 and ϕ105, and prophage DNAs extracted from lysogens carrying these phages, were used to transfect isogenic r+ m+ B. subtilis recipients which were either non-lysogenic, or had been lysogenized with a homologous or a non-homologous phage. Restriction of transfecting phage and prophage DNA occurred in non-lysogenic recipients and in recipients lysogenic for a non-homologous phage. No effect of restriction was observed when phage or prophage DNA was used to transfect recipients carrying a homologous prophage. This is analogous to the absence of restriction in transformation and indicates that in B. subtilis the distinction between transforming and transforming and transfecting DNA is not made at the initial stages of DNA uptake and processing, but rather at later stages, where recognition of homologous regions in donor and recipient DNA plays an important role.
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Bron, S., Luxen, E. & Trautner, T.A. Restriction and modification in B. subtilis . Molec. Gen. Genet. 179, 111–117 (1980). https://doi.org/10.1007/BF00268452
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DOI: https://doi.org/10.1007/BF00268452