title: Energy migration in the poly(rA--rU)-ethidium complex. Determination of the unwinding angle of the polyribonucleic helix.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002627:Chemistry, Physical; D004735:Energy Transfer; D004996:Ethidium / Q000378:metabolism*; D008968:Molecular Conformation; D011063:Poly A-U / Q000378:metabolism*; D013050:Spectrometry, Fluorescence
chemical_list: D011063:Poly A-U; D004996:Ethidium