|
|
| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [A] Methanococcus vannielii (strain SB / ATCC 35089 / DSM 1224) | METVS1034 |  HIS2_METVS | 259986 | (41) |
| [A] Methanococcus maripaludis (strain C7 / ATCC BAA-1331) | METM71040 | HIS2_METM7 | 259990 | (14) |
| [A] Methanocaldococcus jannaschii | METJA310 | HIS2_METJA | 259990 | (14) |