title: Crystallizations and preliminary x-ray studies of calotropins DI and DII.
mesh_terms: D003460:Crystallization; D003546:Cysteine Endopeptidases; D010450:Endopeptidases; D014961:X-Ray Diffraction
chemical_list: D010450:Endopeptidases; D003546:Cysteine Endopeptidases; C028149:calotropin DI; C028151:calotropin DII