title: Structure and function of phospholipases: an X-ray study of prophospholipase A2.
mesh_terms: D000818:Animals; D001665:Binding Sites; D002118:Calcium / Q000378:metabolism; D010179:Pancreas / Q000201:enzymology; D010740:Phospholipases; D011487:Protein Conformation; D013329:Structure-Activity Relationship; D013552:Swine; D014961:X-Ray Diffraction
chemical_list: D010740:Phospholipases; D002118:Calcium