| Complex II | Complex III | Complex IV | Complex V |
|---|
| Hsa | Ago | Hsa | Ago | Hsa | Agoa | Hsa | Ago |
|---|
| | | | | | | F1 subunits | |
| SDHA | Sdh1 | UQCRC1 | Qcr1 | COX1 | Cox1 | ATP5F1A | Atp1 (AtpA) |
| SDHB | Sdh2 | UQCRC2 | Qcr2 | COX2 | Cox2 | ATP5F1B | Atp2 (AtpD) |
| SDHC | Sdh3 | MT-CYB | Qcr3 (Cob) | COX3 | Cox3 | ATP5F1C | Atp3 (AtpG) |
| SDHD | Sdh4 | CYC1 | Qcr4 (Cyc1) | COX4 | Cox5 | ATP5F1D | Atp16 (AtpC) |
| n.d. | Sdh5 | UQCRFS1 | Qcr5 | COX5Ac | n.d. (Cox6) | ATP5F1E | Atp15 |
| | | UQCRH | Qcr6 | COX5B | Cox4 | | |
| | | UQCRB | Qcr7 | COX6A | Cox13 | Fo subunits | |
| | | UQCRQ | Qcr8 | COX6B | Cox12 | MT-ATP6 | Atp6 (AtpB) |
| | | UQCR10 | Qcr9 | COX6Cc | n.d. (Cox9) | ATP5PB | Atp4 (Orf25 / Ymf39) |
| | | UQCR11 | n.d. | COX7A | Cox7 | ATP5MC1/2/3 | Atp9 (AtpE) |
| | | Subunit 9b | | COX7Bd | n.d. (—) | ATP5PD | Atp7 |
| | | | | COX7C | n.d. (Cox8) | ATP5ME | n.d. |
| | | | | COX8 | Cox8he (—) | ATP5MF | Atp17 |
| | | | | COXFA4f | CoxFA4 | ATP5MG | n.d. |
| | | | | | | ATP5PF | F6 |
| | | | | | | ATP5PO | Atp5 (AtpH) |
| | | | | | | MT-ATP8 | Atp8 (OrfB / Ymf19) |
| | | | | | | ATP5IF1 | Inh1 |
| | | | | | | ATP5Sc | n.d. |
- Subunits shown in bold are encoded in mtDNA. n.d., not detected
- aYeast (Saccharomyces cerevisiae) nomenclature
- b8-kDa cleavage product from the N-terminus of the Rieske protein (UQCRFS1)
- cNot identified outside of opisthokonts
- dNot identified outside of animals
- eRetrieved with Arabidopsis CoxVc (At2g47380), considered to be the counterpart of mammalian CoxVIII (see [50])
- fNDUFA4 (MLRQ), previously considered to be a Complex I subunit [51]
