title: Theory and practice for studies for peptides by 15N nuclear magnetic resonance at natural abundance: gramicidin S.
abstract: The low-abundance isotope of nitrogen, 15N, is now accessible to study by the latest high resolution nuclear magnetic resonance techniques. Structure and motion in polypeptides of moderate size may now be usefully investigated in this way.
mesh_terms: D006096:Gramicidin; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D009587:Nitrogen Isotopes; D010455:Peptides; D011487:Protein Conformation
chemical_list: D009587:Nitrogen Isotopes; D010455:Peptides; D006096:Gramicidin