title: Internal motions in DNA.
abstract: We have measured the 31P and 1H NMR parameters of fractionated double-stranded DNA fragments 600, 300, and 150 base pairs long. The results indicate that, inside an intact double helix, both the deoxyribose and the sugar-phosphate backbone of the helix fluctuate substantially from their equilibrium geometry. The time constant for those coupled motions is of the order of 1 nsec.
mesh_terms: D004247:DNA / Q000502:physiology*; D003855:Deoxyribose; D009682:Magnetic Resonance Spectroscopy; D008962:Models, Theoretical; D008970:Molecular Weight; D009038:Motion; D009690:Nucleic Acid Conformation; D010710:Phosphates; D013696:Temperature
chemical_list: D010710:Phosphates; D003855:Deoxyribose; D004247:DNA