title: IV. Cysteine proteinases. The structure of the papain molecule.
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D055598:Chemical Phenomena; D002621:Chemistry; D003461:Crystallography; D003545:Cysteine; D010450:Endopeptidases; D010206:Papain; D013329:Structure-Activity Relationship
chemical_list: D010450:Endopeptidases; D010206:Papain; D003545:Cysteine