Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0004867 | molecular_function | serine-type endopeptidase inhibitor activity |
| B | 0004867 | molecular_function | serine-type endopeptidase inhibitor activity |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 9 |
| Details | binding site for residue SO4 A 4001 |
| Chain | Residue |
| A | PHE4 |
| A | LYS41 |
| A | ARG42 |
| A | ARG53 |
| A | HOH4127 |
| B | ARG39 |
| B | HOH211 |
| B | HOH236 |
| B | HOH239 |
| site_id | AC2 |
| Number of Residues | 8 |
| Details | binding site for residue SO4 A 4002 |
| Chain | Residue |
| A | ARG20 |
| A | TYR35 |
| A | ALA40 |
| A | HOH4105 |
| A | HOH4107 |
| A | HOH4111 |
| B | ARG42 |
| B | HOH223 |
| site_id | AC3 |
| Number of Residues | 5 |
| Details | binding site for residue SO4 A 4003 |
| Chain | Residue |
| A | ILE18 |
| A | ARG20 |
| A | LYS46 |
| A | HOH4115 |
| A | HOH4172 |
| site_id | AC4 |
| Number of Residues | 6 |
| Details | binding site for residue SO4 B 101 |
| Chain | Residue |
| A | HOH4101 |
| B | ARG20 |
| B | TYR35 |
| B | ALA40 |
| B | HOH205 |
| B | HOH222 |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 2 |
| Details | SITE: Reactive bond for trypsin |
| Chain | Residue | Details |
| A | LYS15 | |
| B | LYS15 | |
