title: Crystal structures of Streptomyces subtilisin inhibitor and its complex with subtilisin BPN'.
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D005075:Biological Evolution; D003461:Crystallography; D011480:Protease Inhibitors / Q000378:metabolism; D011485:Protein Binding; D011487:Protein Conformation; D013302:Streptomyces / Q000201:enzymology*; D013379:Substrate Specificity; D013381:Subtilisins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D014359:Trypsin Inhibitor, Kazal Pancreatic / Q000235:genetics
chemical_list: D011480:Protease Inhibitors; D014359:Trypsin Inhibitor, Kazal Pancreatic; D013381:Subtilisins