title: Nuclear magnetic resonance titration curves of histidine ring protons. 3. Ribonuclease.
mesh_terms: D000818:Animals; D001224:Aspartic Acid; D002264:Carboxylic Acids; D002417:Cattle; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles; D007477:Ions; D008239:Lysine; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D010179:Pancreas / Q000201:enzymology; D011522:Protons; D012260:Ribonucleases; D014961:X-Ray Diffraction
chemical_list: D002264:Carboxylic Acids; D007093:Imidazoles; D007477:Ions; D011522:Protons; D001224:Aspartic Acid; D006639:Histidine; D012260:Ribonucleases; D008239:Lysine