Abstract
In mitomycin C-treated lambda lysogens, even though the rate of synthesis of RecA protein was greatly reduced by a low concentration of rifampicin (4 microgram/ml), induction of prophage lambda occurred readily as assessed by (i) cell lysis of the lysogens, (ii) production of progeny phage, and (iii) extensive cleavage of lambda repressor. The extent and the rate of cleavage of lambda repressor were not significantly affected by the low rate of synthesis of RecA protein resulting from rifampicin action. However, the yield of phage progeny was reduced and lysis of the cells was slightly delayed. We conclude that in RecA+ bacteria, induction of prophage lambda does not require full induction of RecA protein synthesis.
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