Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0004867 | molecular_function | serine-type endopeptidase inhibitor activity |
| A | 0005576 | cellular_component | extracellular region |
| A | 0005615 | cellular_component | extracellular space |
| A | 0015459 | molecular_function | potassium channel regulator activity |
| A | 0035821 | biological_process | modulation of process of another organism |
| A | 0090729 | molecular_function | toxin activity |
| A | 0099106 | molecular_function | ion channel regulator activity |
Functional Information from PROSITE/UniProt
| site_id | PS00280 |
| Number of Residues | 19 |
| Details | BPTI_KUNITZ_1 Pancreatic trypsin inhibitor (Kunitz) family signature. FtwSGCggnsnrFktieeC |
| Chain | Residue | Details |
| A | PHE35-CYS53 | |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 1 |
| Details | SITE: May be the major determinant of the binding affinity for potassium channels |
| site_id | SWS_FT_FI2 |
| Number of Residues | 1 |
| Details | SITE: Important for binding to potassium channels |
| site_id | SWS_FT_FI3 |
| Number of Residues | 1 |
| Details | SITE: Not important for inhibition of potassium channels |
| Chain | Residue | Details |
| A | LYS19 | |
