Inducible repair system in Haemophilus influenzae unaccompanied by mutation.
Abstract
Weigle reactivation of ultraviolet-irradiated HPlc1 phage was observed after ultraviolet or mitomycin C treatment of Haemophilus influenzae cells. The amount of reactivation was considerably increased when the treated cells were incubated in growth medium before infection. The presence of chloramphenicol during this incubation abolished the reactivation. No mutation of this phage accompanied the reactivation. When cells were treated so as to produce a maximal reactivation of phage, neither reactivation or mutation of cells was observed. It is concluded that H. influenzae has an inducible repair system that is not accompanied by mutation.
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