title: Paramagnetic labeling studies. 1. A new method for labeling proteins with a stable paramagnetic nitroxide radical.
mesh_terms: D003497:Cyclic N-Oxides; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D006863:Hydrogen-Ion Concentration; D008239:Lysine; D008722:Methods; D010455:Peptides; D011506:Proteins / Q000032:analysis*
chemical_list: D003497:Cyclic N-Oxides; D005609:Free Radicals; D010455:Peptides; D011506:Proteins; D008239:Lysine