title: 23Na-NMR investigations of counterion exchange reactions of helical DNA.
mesh_terms: D000818:Animals; D002417:Cattle; D004247:DNA; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009690:Nucleic Acid Conformation; D012964:Sodium; D013950:Thymus Gland
chemical_list: D004247:DNA; D012964:Sodium