title: NMR double resonance study of azidoferricytochrome C.
mesh_terms: D001386:Azides; D055598:Chemical Phenomena; D002621:Chemistry; D003580:Cytochromes / Q000528:radiation effects; D009682:Magnetic Resonance Spectroscopy; D008433:Mathematics; D011166:Porphyrins; D011485:Protein Binding; D011830:Radiation Effects; D011846:Radio Waves
chemical_list: D001386:Azides; D003580:Cytochromes; D011166:Porphyrins