title: Proton NMR spectroscopy of the active site histidine of alpha-lytic proteinase. Effects of adjacent 13C and 15N labels.
mesh_terms: D001665:Binding Sites; D002247:Carbon Isotopes; D010450:Endopeptidases; D006639:Histidine; D007553:Isotope Labeling; D009682:Magnetic Resonance Spectroscopy; D009587:Nitrogen Isotopes; D012697:Serine Endopeptidases
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D006639:Histidine; D010450:Endopeptidases; D012697:Serine Endopeptidases; C021826:myxobacter alpha-lytic proteinase