title: High resolution nuclear magnetic resonance study of the histidine--aspartate hydrogen bond in chymotrypsin and chymotrypsinogen.
mesh_terms: D001224:Aspartic Acid; D001665:Binding Sites; D002918:Chymotrypsin; D002919:Chymotrypsinogen; D006639:Histidine; D006859:Hydrogen; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008967:Molecular Biology
chemical_list: D001224:Aspartic Acid; D006639:Histidine; D006859:Hydrogen; D002919:Chymotrypsinogen; D002918:Chymotrypsin