title: Direct measurement of DNA unwinding angle in specific interaction between lac operator and repressor.
mesh_terms: D004926:Escherichia coli / Q000235:genetics; D007763:Lac Operon; D009154:Mutation; D009690:Nucleic Acid Conformation; D010957:Plasmids; D011485:Protein Binding; D012097:Repressor Proteins / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D012097:Repressor Proteins; D014157:Transcription Factors