title: The pKa value of His 57-Asp 102 couple in the active site of bovine pancreatic beta-trypsin: a molecular orbital study.
mesh_terms: D000818:Animals; D001224:Aspartic Acid; D001665:Binding Sites; D002417:Cattle; D006639:Histidine; D006860:Hydrogen Bonding; D008956:Models, Chemical; D010179:Pancreas / Q000201:enzymology; D011522:Protons; D011789:Quantum Theory; D014357:Trypsin
chemical_list: D011522:Protons; D001224:Aspartic Acid; D006639:Histidine; D014357:Trypsin