title: Models of the quaternary structure of collagenase.
mesh_terms: D002118:Calcium; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D003013:Clostridium / Q000201:enzymology; D006863:Hydrogen-Ion Concentration; D046911:Macromolecular Substances; D008433:Mathematics; D003012:Microbial Collagenase / Q000302:isolation & purification; D011487:Protein Conformation; D012542:Scattering, Radiation; D013696:Temperature; D014965:X-Rays
chemical_list: D046911:Macromolecular Substances; D003012:Microbial Collagenase; D002118:Calcium