| Domain | Name | Category | Type |
| IPR001505 | Copper centre Cu(A) | Site | Binding site |
| IPR002429 | Cytochrome c oxidase subunit II-like C-terminal | Domain | Domain |
| IPR008972 | Cupredoxin | Family | Homologous superfamily |
| IPR011759 | Cytochrome C oxidase subunit II, transmembrane domain | Domain | Domain |
| IPR014222 | Cytochrome c oxidase, subunit II | Domain | Domain |
| IPR034210 | Cytochrome c oxidase subunit 2, C-terminal | Domain | Domain |
| IPR036257 | Cytochrome C oxidase subunit II, transmembrane domain superfamily | Family | Homologous superfamily |