| Chain | GOid | namespace | contents |
| A | 0008168 | molecular_function | methyltransferase activity |
| A | 0008757 | molecular_function | S-adenosylmethionine-dependent methyltransferase activity |
| A | 0009236 | biological_process | cobalamin biosynthetic process |
| A | 0016740 | molecular_function | transferase activity |
| A | 0030788 | molecular_function | precorrin-2 C20-methyltransferase activity |
| A | 0032259 | biological_process | methylation |
| B | 0008168 | molecular_function | methyltransferase activity |
| B | 0008757 | molecular_function | S-adenosylmethionine-dependent methyltransferase activity |
| B | 0009236 | biological_process | cobalamin biosynthetic process |
| B | 0016740 | molecular_function | transferase activity |
| B | 0030788 | molecular_function | precorrin-2 C20-methyltransferase activity |
| B | 0032259 | biological_process | methylation |