| IPR007863 | Peptidase M16, C-terminal | Domain |
| IPR011765 | Peptidase M16, N-terminal | Domain |
| IPR011249 | Metalloenzyme, LuxS/M16 peptidase-like | Homologous Superfamily |
| IPR050361 | Mitochondrial Processing Peptidase/Ubiquinol-cytochrome c Reductase Complex | Family |
| IPR007863 | Peptidase M16, C-terminal | Domain |
| IPR011765 | Peptidase M16, N-terminal | Domain |
| IPR011249 | Metalloenzyme, LuxS/M16 peptidase-like | Homologous Superfamily |
| IPR050361 | Mitochondrial Processing Peptidase/Ubiquinol-cytochrome c Reductase Complex | Family |
| IPR001431 | Peptidase M16, zinc-binding site | Binding Site |
| IPR036150 | Cytochrome b/b6, C-terminal domain superfamily | Homologous Superfamily |
| IPR027387 | Cytochrome b/b6-like domain superfamily | Homologous Superfamily |
| IPR048260 | Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial | Domain |
| IPR016174 | Di-haem cytochrome, transmembrane | Homologous Superfamily |
| IPR005798 | Cytochrome b/b6, C-terminal | Domain |
| IPR048259 | Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial | Domain |
| IPR030689 | Cytochrome b | Family |
| IPR005797 | Cytochrome b/b6, N-terminal domain | Domain |
| IPR036909 | Cytochrome c-like domain superfamily | Homologous Superfamily |
| IPR002326 | Cytochrome c1 | Family |
| IPR009056 | Cytochrome c-like domain | Domain |
| IPR021157 | Cytochrome c1, transmembrane anchor, C-terminal | Homologous Superfamily |
| IPR036922 | Rieske [2Fe-2S] iron-sulphur domain superfamily | Homologous Superfamily |
| IPR014349 | Rieske iron-sulphur protein | Family |
| IPR011070 | Globular protein, non-globular alpha/beta subunit | Homologous Superfamily |
| IPR004192 | Cytochrome b-c1 complex subunit Rieske, transmembrane domain | Domain |
| IPR015248 | Ubiquinol-cytochrome c reductase iron-sulphur subunit, N-terminal | Domain |
| IPR017941 | Rieske [2Fe-2S] iron-sulphur domain | Domain |
| IPR005805 | Rieske iron-sulphur protein, C-terminal | Domain |
| IPR037008 | Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily | Homologous Superfamily |
| IPR006317 | Ubiquinol-cytochrome c reductase, iron-sulphur subunit | Domain |
| IPR003197 | Cytochrome b-c1 complex subunit 7 | Family |
| IPR036544 | Cytochrome b-c1 complex subunit 7 superfamily | Homologous Superfamily |
| IPR004205 | Cytochrome b-c1 complex subunit 8 | Family |
| IPR036642 | Cytochrome b-c1 complex subunit 8 superfamily | Homologous Superfamily |
| IPR003422 | Cytochrome b-c1 complex, subunit 6 | Family |
| IPR023184 | Ubiquinol-cytochrome C reductase hinge domain | Domain |
| IPR036811 | Ubiquinol-cytochrome C reductase hinge domain superfamily | Homologous Superfamily |
| IPR008027 | Cytochrome b-c1 complex subunit 9 | Family |
| IPR036656 | Cytochrome b-c1 complex subunit 9 superfamily | Homologous Superfamily |
| IPR029027 | Single alpha-helix domain superfamily | Homologous Superfamily |
| IPR015089 | Cytochrome b-c1 complex subunit 10 | Family |