title: Studies on the active site of papain. V. Photooxidation of histidine residues.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001665:Binding Sites; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D008027:Light; D010206:Papain; D010777:Photochemistry; D013438:Sulfhydryl Compounds / Q000378:metabolism
chemical_list: D000596:Amino Acids; D013438:Sulfhydryl Compounds; D006639:Histidine; D010206:Papain