| Domain | Name | Category | Type |
| IPR000008 | C2 domain | Domain | Domain |
| IPR000169 | Cysteine peptidase, cysteine active site | Site | Active site |
| IPR001300 | Peptidase C2, calpain, catalytic domain | Domain | Domain |
| IPR022682 | Peptidase C2, calpain, large subunit, domain III | Domain | Domain |
| IPR022683 | Peptidase C2, calpain, domain III | Domain | Domain |
| IPR022684 | Peptidase C2, calpain family | Family | Family |
| IPR033883 | Calpain subdomain III | Domain | Domain |
| IPR033884 | Calpain C2 domain | Domain | Domain |
| IPR035892 | C2 domain superfamily | Family | Homologous superfamily |
| IPR036213 | Calpain large subunit, domain III superfamily | Family | Homologous superfamily |
| IPR038765 | Papain-like cysteine peptidase superfamily | Family | Homologous superfamily |