title: The directed evolution of radiation resistance in E. coli.
abstract: E. coli AB1157 (a wild-type, K-12 strain having no known defects in DNA repair capability) was irradiated daily with a very large X-ray dose to develop a series of strains unusually resistant to both X rays and ultraviolet (UV) photons. An understanding of how wild-type strains mutate and become more resistant should lead to a better understanding of DNA repair processes and their effects on radiation sensitivity.
mesh_terms: D005075:Biological Evolution; D004307:Dose-Response Relationship, Radiation; D004926:Escherichia coli / Q000235:genetics* / Q000254:growth & development / Q000528:radiation effects*; D007700:Kinetics; D013997:Time Factors; D014466:Ultraviolet Rays; D014965:X-Rays