| A | COX1 | e1occA1 | A: alpha superhelices | X: Cytochrome c oxidase subunit I-like | H: Cytochrome c oxidase subunit I-like (From Topology) | T: Cytochrome c oxidase subunit I-like | F: COX1 | ECOD (1.6) |
| N | COX1 | e1occN1 | A: alpha superhelices | X: Cytochrome c oxidase subunit I-like | H: Cytochrome c oxidase subunit I-like (From Topology) | T: Cytochrome c oxidase subunit I-like | F: COX1 | ECOD (1.6) |
| B | COX2 | e1occB1 | A: beta sandwiches | X: Cupredoxin-like | H: Cupredoxin-related (From Topology) | T: Cupredoxin-related | F: COX2 | ECOD (1.6) |
| B | COX2_TM | e1occB2 | A: extended segments | X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology) | H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology) | T: Cytochrome c oxidase subunit II-like, transmembrane region | F: COX2_TM | ECOD (1.6) |
| O | COX2 | e1occO1 | A: beta sandwiches | X: Cupredoxin-like | H: Cupredoxin-related (From Topology) | T: Cupredoxin-related | F: COX2 | ECOD (1.6) |
| O | COX2_TM | e1occO2 | A: extended segments | X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology) | H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology) | T: Cytochrome c oxidase subunit II-like, transmembrane region | F: COX2_TM | ECOD (1.6) |
| C | COX3 | e1occC1 | A: alpha bundles | X: Cytochrome c oxidase subunit III-like (From Topology) | H: Cytochrome c oxidase subunit III-like (From Topology) | T: Cytochrome c oxidase subunit III-like | F: COX3 | ECOD (1.6) |
| P | COX3 | e1occP1 | A: alpha bundles | X: Cytochrome c oxidase subunit III-like (From Topology) | H: Cytochrome c oxidase subunit III-like (From Topology) | T: Cytochrome c oxidase subunit III-like | F: COX3 | ECOD (1.6) |
| D | COX4 | e1occD1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit IV (From Topology) | H: Mitochondrial cytochrome c oxidase subunit IV (From Topology) | T: Mitochondrial cytochrome c oxidase subunit IV | F: COX4 | ECOD (1.6) |
| Q | COX4 | e1occQ1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit IV (From Topology) | H: Mitochondrial cytochrome c oxidase subunit IV (From Topology) | T: Mitochondrial cytochrome c oxidase subunit IV | F: COX4 | ECOD (1.6) |
| E | COX5A | e1occE1 | A: alpha superhelices | X: Repetitive alpha hairpins | H: Cytochrome c oxidase subunit E (From Topology) | T: Cytochrome c oxidase subunit E | F: COX5A | ECOD (1.6) |
| R | COX5A | e1occR1 | A: alpha superhelices | X: Repetitive alpha hairpins | H: Cytochrome c oxidase subunit E (From Topology) | T: Cytochrome c oxidase subunit E | F: COX5A | ECOD (1.6) |
| F | COX5B | e1occF1 | A: few secondary structure elements | X: Rubredoxin-like | H: Rubredoxin-related | T: Cytochrome c oxidase Subunit F | F: COX5B | ECOD (1.6) |
| S | COX5B | e1occS1 | A: few secondary structure elements | X: Rubredoxin-like | H: Rubredoxin-related | T: Cytochrome c oxidase Subunit F | F: COX5B | ECOD (1.6) |
| G | COX6A | e1occG1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIa (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIa (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIa | F: COX6A | ECOD (1.6) |
| T | COX6A | e1occT1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIa (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIa (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIa | F: COX6A | ECOD (1.6) |
| H | COX6B | e1occH1 | A: few secondary structure elements | X: Cytochrome c oxidase subunit h (From Topology) | H: Cytochrome c oxidase subunit h (From Topology) | T: Cytochrome c oxidase subunit h | F: COX6B | ECOD (1.6) |
| U | COX6B | e1occU1 | A: few secondary structure elements | X: Cytochrome c oxidase subunit h (From Topology) | H: Cytochrome c oxidase subunit h (From Topology) | T: Cytochrome c oxidase subunit h | F: COX6B | ECOD (1.6) |
| I | COX6C | e1occI1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIc (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIc (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIc | F: COX6C | ECOD (1.6) |
| V | COX6C | e1occV1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIc (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIc (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIc | F: COX6C | ECOD (1.6) |
| J | COX7a | e1occJ1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIa (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIa (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIa | F: COX7a | ECOD (1.6) |
| W | COX7a | e1occW1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIa (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIa (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIa | F: COX7a | ECOD (1.6) |
| K | COX7B | e1occK1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIb (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIb (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIb | F: COX7B | ECOD (1.6) |
| X | COX7B | e1occX1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIb (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIb (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIb | F: COX7B | ECOD (1.6) |
| L | COX7C | e1occL1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) | F: COX7C | ECOD (1.6) |
| Y | COX7C | e1occY1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa) | F: COX7C | ECOD (1.6) |
| M | COX8 | e1occM1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) | F: COX8 | ECOD (1.6) |
| Z | COX8 | e1occZ1 | A: extended segments | X: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) (From Topology) | H: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) (From Topology) | T: Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX) | F: COX8 | ECOD (1.6) |