Topography of nucleic acid helices in solutons. A nuclear magnetic resonance study of the interactions of reporter molecules with deoxyribonucleic acid. Evidence for hydrogen-bonding interactions

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Abstract
The 1H n.m.r. signals of the methyl protons of tertiary ammonium salts' complexes with DNA are considerably more broadened than those of the corresponding quaternary ammonium salts, and strongly suggestive of H-bonding interactions of DNA with the tertiary ammonium salts (1), (3), and (5).