| Domain | Name | Category | Type |
| IPR002223 | Pancreatic trypsin inhibitor Kunitz domain | Domain | Domain |
| IPR008296 | Tissue factor pathway inhibitor-like | Family | Family |
| IPR020901 | Proteinase inhibitor I2, Kunitz, conserved site | Site | Conserved site |
| IPR029860 | Tissue factor pathway inhibitor 2 | Family | Family |
| IPR036880 | Pancreatic trypsin inhibitor Kunitz domain superfamily | Family | Homologous superfamily |