Induction of lethal damage in E. coli by Cerenkov emission associated with high-energy X-rays: the effect of bromouracil substitution.

5.1. The damages induced in E. coli AB2487 recA by Cerenkov emission and ionizing radiation contribute in an additive fashion to the overall lethality, and do not interact in a synergistic fashion. 5.2. BU substitution enhances the lethal action of high energy X-irradiation on E. coli AB2487 recA by a mechanism involving enhanced radiosensitivity and enhanced photosensitivity.