title: Solvent isotope effects on tautomerization equilibria of papain and model thiolamines.
mesh_terms: D003545:Cysteine; D007700:Kinetics; D008624:Mercaptoethylamines; D010206:Papain / Q000378:metabolism; D011485:Protein Binding; D013056:Spectrophotometry, Ultraviolet
chemical_list: D008624:Mercaptoethylamines; D010206:Papain; D003545:Cysteine