| Chain | GOid | namespace | contents |
| a | 0000166 | molecular_function | nucleotide binding |
| a | 0016491 | molecular_function | oxidoreductase activity |
| a | 0046872 | molecular_function | metal ion binding |
| a | 0051536 | molecular_function | iron-sulfur cluster binding |
| a | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| A | 0000166 | molecular_function | nucleotide binding |
| A | 0016491 | molecular_function | oxidoreductase activity |
| A | 0046872 | molecular_function | metal ion binding |
| A | 0051536 | molecular_function | iron-sulfur cluster binding |
| A | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| b | 0015948 | biological_process | methanogenesis |
| b | 0016491 | molecular_function | oxidoreductase activity |
| b | 0051536 | molecular_function | iron-sulfur cluster binding |
| b | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| b | 0051912 | molecular_function | CoB--CoM heterodisulfide reductase activity |
| B | 0015948 | biological_process | methanogenesis |
| B | 0016491 | molecular_function | oxidoreductase activity |
| B | 0051536 | molecular_function | iron-sulfur cluster binding |
| B | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| B | 0051912 | molecular_function | CoB--CoM heterodisulfide reductase activity |
| c | 0005886 | cellular_component | plasma membrane |
| c | 0015948 | biological_process | methanogenesis |
| c | 0016491 | molecular_function | oxidoreductase activity |
| c | 0046872 | molecular_function | metal ion binding |
| c | 0051536 | molecular_function | iron-sulfur cluster binding |
| c | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| c | 0051912 | molecular_function | CoB--CoM heterodisulfide reductase activity |
| C | 0005886 | cellular_component | plasma membrane |
| C | 0015948 | biological_process | methanogenesis |
| C | 0016491 | molecular_function | oxidoreductase activity |
| C | 0046872 | molecular_function | metal ion binding |
| C | 0051536 | molecular_function | iron-sulfur cluster binding |
| C | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| C | 0051912 | molecular_function | CoB--CoM heterodisulfide reductase activity |
| D | 0003954 | molecular_function | NADH dehydrogenase activity |
| D | 0008863 | molecular_function | formate dehydrogenase (NAD+) activity |
| D | 0015942 | biological_process | formate metabolic process |
| D | 0016020 | cellular_component | membrane |
| D | 0016491 | molecular_function | oxidoreductase activity |
| D | 0022904 | biological_process | respiratory electron transport chain |
| D | 0043546 | molecular_function | molybdopterin cofactor binding |
| D | 0046872 | molecular_function | metal ion binding |
| D | 0051536 | molecular_function | iron-sulfur cluster binding |
| D | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| E | 0000166 | molecular_function | nucleotide binding |
| E | 0016491 | molecular_function | oxidoreductase activity |
| E | 0046872 | molecular_function | metal ion binding |
| E | 0051536 | molecular_function | iron-sulfur cluster binding |
| E | 0051539 | molecular_function | 4 iron, 4 sulfur cluster binding |
| E | 0052592 | molecular_function | oxidoreductase activity, acting on CH or CH2 groups, with an iron-sulfur protein as acceptor |
| F | 0016491 | molecular_function | oxidoreductase activity |
| F | 0046872 | molecular_function | metal ion binding |
| F | 0051536 | molecular_function | iron-sulfur cluster binding |
| F | 0051537 | molecular_function | 2 iron, 2 sulfur cluster binding |