title: Letter: Unwinding the DNA helix by intercalation.
mesh_terms: D000166:Acridines / Q000494:pharmacology; D004247:DNA; D003630:Daunorubicin / Q000494:pharmacology; D004735:Energy Transfer; D004996:Ethidium / Q000494:pharmacology; D005453:Fluorescence; D008961:Models, Structural; D009690:Nucleic Acid Conformation / Q000187:drug effects*; D014961:X-Ray Diffraction
chemical_list: D000166:Acridines; D004247:DNA; D004996:Ethidium; D003630:Daunorubicin