title: Phosphorus distribution in the nucleosome.
abstract: The spatial distribution of phosphorus within active fraction nucleosomes reveals that the path of the DNA is consistent with one and three-fourths turns of DNA supercoiled around the outside of the protein core. This phosphorus distribution, obtained with an imaging electron spectrometer in a conventional transmission electron microscope, simultaneously establishes new limits of sensitivity for elemental microanalysis.
mesh_terms: D000818:Animals; D002417:Cattle; D004247:DNA; D004577:Electron Probe Microanalysis; D008854:Microscopy, Electron / Q000379:methods; D009690:Nucleic Acid Conformation; D009707:Nucleosomes / Q000648:ultrastructure*; D010758:Phosphorus; D014158:Transcription, Genetic
chemical_list: D009707:Nucleosomes; D010758:Phosphorus; D004247:DNA