H-ARG-PRO-ASP-PHE-CYS-LEU-GLU-PRO-PRO-TYR-THR-GLY-PRO-CYS-LYS-ALA-ARG-ILE-ILE-ARG-TYR-PHE-TYR-ASN-ALA-LYS-ALA-GLY-LEU-CYS-GLN-THR-PHE-VAL-TYR-GLY-GLY-CYS-ARG-ALA-LYS-ARG-ASN-ASN-PHE-LYS-SER-ALA-GLU-ASP-CYS-MET-ARG-THR-CYS-GLY-GLY-ALA-OH EC: 3.4.21.9 APROTININ, BOVINE APROTININ BOVINE LUNG BPTI PROTEASE INHIBITOR, BOVINE LUNG TRYPSIN INHIBITOR (BASIC) TRYPSIN INHIBITOR, BOVINE LUNG