title: Mercaptide-imidazolium ion-pair: the reactive nucleophile in papain catalysis.
mesh_terms: D000081:Acetamides; D001565:Benzoates; D001665:Binding Sites; D002850:Chromatography, Gel; D004220:Disulfides; D005978:Glutathione; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D007461:Iodoacetates; D007700:Kinetics; D008433:Mathematics; D010206:Papain / Q000031:analogs & derivatives* / Q000378:metabolism; D011485:Protein Binding; D013056:Spectrophotometry, Ultraviolet; D013381:Subtilisins; D013438:Sulfhydryl Compounds
chemical_list: D000081:Acetamides; D001565:Benzoates; D004220:Disulfides; D007461:Iodoacetates; D013438:Sulfhydryl Compounds; D006639:Histidine; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D013381:Subtilisins; D010206:Papain; D005978:Glutathione