| Chain | GOid | namespace | contents |
| A | 0006730 | biological_process | one-carbon metabolic process |
| A | 0008901 | molecular_function | ferredoxin hydrogenase activity |
| A | 0015948 | biological_process | methanogenesis |
| A | 0016491 | molecular_function | oxidoreductase activity |
| A | 0019386 | biological_process | methanogenesis, from carbon dioxide |
| A | 0030268 | molecular_function | methylenetetrahydromethanopterin dehydrogenase activity |
| B | 0006730 | biological_process | one-carbon metabolic process |
| B | 0008901 | molecular_function | ferredoxin hydrogenase activity |
| B | 0015948 | biological_process | methanogenesis |
| B | 0016491 | molecular_function | oxidoreductase activity |
| B | 0019386 | biological_process | methanogenesis, from carbon dioxide |
| B | 0030268 | molecular_function | methylenetetrahydromethanopterin dehydrogenase activity |
| C | 0006730 | biological_process | one-carbon metabolic process |
| C | 0008901 | molecular_function | ferredoxin hydrogenase activity |
| C | 0015948 | biological_process | methanogenesis |
| C | 0016491 | molecular_function | oxidoreductase activity |
| C | 0019386 | biological_process | methanogenesis, from carbon dioxide |
| C | 0030268 | molecular_function | methylenetetrahydromethanopterin dehydrogenase activity |