title: Normal apparent pKa value for the ionization of the histidine residue of papain and stem bromelain as determined by photooxidation reaction.
mesh_terms: D001963:Bromelains / Q000037:antagonists & inhibitors*; D002850:Chromatography, Gel; D006639:Histidine / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008027:Light; D010084:Oxidation-Reduction; D010206:Papain / Q000037:antagonists & inhibitors*; D011487:Protein Conformation; D013696:Temperature; D013997:Time Factors
chemical_list: D006639:Histidine; D001963:Bromelains; D010206:Papain