title: The assignment of an exchangeable low-field NH proton resonance of ribonuclease A to the active-site histidine-119.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001665:Binding Sites; D002417:Cattle; D003201:Computers; D003597:Cytosine Nucleotides; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D010179:Pancreas / Q000201:enzymology; D010710:Phosphates; D011487:Protein Conformation; D011522:Protons; D012260:Ribonucleases / Q000037:antagonists & inhibitors; D013329:Structure-Activity Relationship; D013696:Temperature
chemical_list: D003597:Cytosine Nucleotides; D007093:Imidazoles; D010710:Phosphates; D011522:Protons; D006639:Histidine; D012260:Ribonucleases