title: DNA topoisomerases and DNA repair.
authors.forename: C S
authors.initials: CS
authors.lastname: Downes
authors.forename: R T
authors.initials: RT
authors.lastname: Johnson
mesh_terms: D000818:Animals; D004249:DNA Damage; D004260:DNA Repair; D004264:DNA Topoisomerases, Type I / Q000378:metabolism*; D004250:DNA Topoisomerases, Type II / Q000378:metabolism*; D009154:Mutation
chemical_list: D004264:DNA Topoisomerases, Type I; D004250:DNA Topoisomerases, Type II