DNA Topoisomerases, Type IDNA Topoisomerases, Type IIDNA TopoisomerasesTopoisomerase InhibitorsTopoisomerase II InhibitorsTopoisomerase I InhibitorsDNA, CircularDNA, SuperhelicalCircular DichroismDNA Topoisomerase IVDNA GyraseDNA, CatenatedTeniposideAmsacrineDNANovobiocinNucleic Acid ConformationEscherichia coliDNA CleavageEllipticinesCatenanesAminoacridinesProscillaridinCrithidiaCamptothecinQuinolonesMolecular Sequence DataPlasmidsDNA ReplicationDNA, KinetoplastModels, MolecularFluoroquinolonesBase SequenceIntercalating AgentsAminocoumarinsCatalysisDNA, BacterialEukaryotic CellsAmino Acid SequenceAnti-Infective AgentsDNA-Binding ProteinsBinding SitesEtoposideProtein ConformationNaphthyridinesEnzyme InhibitorsAntigens, NeoplasmIndenesRecombinasesDNA DamageSubstrate SpecificityDNA, ViralElectrophoresis, Agar GelMutationKineticsRecombination, GeneticProtein Binding4-QuinolonesSaccharomyces cerevisiaeSulfolobusTriterpenesAntineoplastic AgentsDNA, Single-StrandedOligonucleotidesProtein Structure, TertiaryAdenosine TriphosphateThermotoga maritimaArchaeal ProteinsStructure-Activity RelationshipChromatinNucleosomesNorfloxacinAcridinesRecombinant ProteinsProtein Structure, SecondaryCloning, MolecularEndodeoxyribonucleasesVaccinia virusTemperatureDNA, FungalCoumarinsMolecular StructureBacterial ProteinsSpectrophotometry, UltravioletElectrophoresis, Polyacrylamide GelOligodeoxyribonucleotidesCell NucleusHydrolysisCations, DivalentDNA RepairHeLa CellsMolecular WeightDNA NucleotidyltransferasesBiocatalysisIntegrasesAnti-Bacterial AgentsSequence Homology, Amino AcidMicroscopy, ElectronSimian virus 40Cattle