title: DNA supercoiling: another level for regulating gene expression.
mesh_terms: D004264:DNA Topoisomerases, Type I / Q000235:genetics / Q000378:metabolism; D004250:DNA Topoisomerases, Type II / Q000378:metabolism; D004278:DNA, Superhelical / Q000502:physiology*; D004794:Enzyme Repression; D004926:Escherichia coli / Q000235:genetics; D005786:Gene Expression Regulation; D005796:Genes; D009154:Mutation; D009876:Operon; D012486:Salmonella typhimurium / Q000235:genetics; D014158:Transcription, Genetic; D015003:Yeasts / Q000235:genetics
chemical_list: D004278:DNA, Superhelical; D004264:DNA Topoisomerases, Type I; D004250:DNA Topoisomerases, Type II