| Chain | GOid | namespace | contents |
| 4A | 0005739 | cellular_component | mitochondrion |
| 4N | 0004129 | molecular_function | cytochrome-c oxidase activity |
| 4N | 0005507 | molecular_function | copper ion binding |
| 4N | 0016020 | cellular_component | membrane |
| 4P | 0004129 | molecular_function | cytochrome-c oxidase activity |
| 4P | 0005507 | molecular_function | copper ion binding |
| 4P | 0016020 | cellular_component | membrane |
| 4Q | 0004129 | molecular_function | cytochrome-c oxidase activity |
| 4Q | 0005743 | cellular_component | mitochondrial inner membrane |
| 4Q | 0006119 | biological_process | oxidative phosphorylation |
| 4Q | 0006123 | biological_process | mitochondrial electron transport, cytochrome c to oxygen |
| 4Q | 0009060 | biological_process | aerobic respiration |
| 4Q | 0015990 | biological_process | electron transport coupled proton transport |
| 4Q | 0016020 | cellular_component | membrane |
| 4Q | 0020037 | molecular_function | heme binding |
| 4Q | 0022904 | biological_process | respiratory electron transport chain |
| 4Q | 0046872 | molecular_function | metal ion binding |
| 4V | 0005739 | cellular_component | mitochondrion |
| 4V | 0006123 | biological_process | mitochondrial electron transport, cytochrome c to oxygen |
| 4V | 0045277 | cellular_component | respiratory chain complex IV |
| 4X | 0005740 | cellular_component | mitochondrial envelope |
| 4X | 0006123 | biological_process | mitochondrial electron transport, cytochrome c to oxygen |
| 4X | 0045277 | cellular_component | respiratory chain complex IV |