| [A] Cenarchaeum symbiosum | CENSY00450 | A0RUT5 | RNA-binding protein |
| [A] Desulfurococcus kamchatkensis (strain 1221n / DSM 18924) | DESK101402 | B8D6K1 | DNA-binding protein |
| [A] Staphylothermus marinus (strain ATCC 43588 / DSM 3639 / F1) | STAMF00764 | A3DML8 | Hypothetical protein |
| [A] Hyperthermus butylicus (strain DSM 5456 / JCM 9403) | HYPBU01591 | A2BNB1 | Conserved archaeal protein |
| [A] Nitrosopumilus maritimus (strain SCM1) | NITMS01378 | A9A2N9 | Putative uncharacterized protein |
| [A] Sulfolobus acidocaldarius | SULAC00584 | Q4JB13 | conserved Archaeal protein |
| [A] Sulfolobus islandicus (strain L.S.2.15 / Lassen #1) | SULIL01328 | C3MQ32 | |
| [A] Sulfolobus islandicus (strain M.14.25 / Kamchatka #1) | SULIM01244 | C3MVF0 | |
| [A] Sulfolobus islandicus (strain M.16.27) | SULIA01289 | C3N5P9 | |
| [A] Sulfolobus islandicus (strain Y.G.57.14 / Yellowstone #1) | SULIY01340 | C3NEB5 | |
| [A] Sulfolobus islandicus (strain Y.N.15.51 / Yellowstone #2) | SULIN01330 | C3NHD7 | |
| [A] Sulfolobus solfataricus | SULSO00677 | C5SR49 | Putative uncharacterized protein |
| [A] Caldivirga maquilingensis (strain DSMZ 13496 / IC-167) | CALMQ01942 | A8MC13 | Putative uncharacterized protein |
| [A] Pyrobaculum aerophilum | PYRAE02352 | Q8ZTB3 | Putative uncharacterized protein |
| [A] Pyrobaculum arsenaticum (strain DSM 13514 / JCM 11321) | PYRAR01681 | A4WLN4 | Putative nucleotide binding protein |
| [A] Pyrobaculum calidifontis (strain JCM 11548 / VA1) | PYRCJ00426 | A3MT99 | Putative nucleotide binding protein |
| [A] Pyrobaculum islandicum (strain DSM 4184 / JCM 9189) | PYRIL00573 | A1RS26 | Putative nucleotide binding protein |
| [A] Thermoproteus neutrophilus (strain DSM 2338 / JCM 9278 / V24Sta) | THENV01535 | B1Y9U4 | Putative nucleotide binding protein |
| [A] Archaeoglobus fulgidus | ARCFU01503 | O28741 | Putative uncharacterized protein |
| [A] Haloquadratum walsbyi (strain DSM 16790) | HALWD01963 | Q18G99 | conserved hypothetical protein |
| [A] Natronomonas pharaonis (strain DSM 2160 / ATCC 35678) | NATPD01791 | Q3IPL9 | conserved hypothetical protein |
| [A] Methanobrevibacter smithii (strain PS / ATCC 35061 / DSM 861) | METS301364 | A5UN02 | Predicted RNA-binding protein |
| [A] Methanobacterium thermoautotrophicum | METTH01291 | O27380 | Conserved protein |
| [A] Methanocaldococcus jannaschii | METJA00037 | Y038_METJA | Uncharacterized protein MJ0038 |
| [A] Methanococcus aeolicus (strain Nankai-3 / ATCC BAA-1280) | META300054 | A6UT25 | Putative uncharacterized protein |
| [A] Methanococcus maripaludis | METMP00091 | Q6M127 | Conserved hypothetical archaeal protein |
| [A] Methanococcus maripaludis (strain C5 / ATCC BAA-1333) | METM501564 | A4G098 | Putative uncharacterized protein |
| [A] Methanococcus maripaludis (strain C6 / ATCC BAA-1332) | METM600846 | A9A8K0 | Putative uncharacterized protein |
| [A] Methanococcus maripaludis (strain C7 / ATCC BAA-1331) | METM701082 | A6VI80 | Putative uncharacterized protein |
| [A] Methanococcus vannielii (strain SB / ATCC 35089 / DSM 1224) | METVS01071 | A6UR81 | Putative uncharacterized protein |
| [A] Methanoregula boonei (strain 6A8) | METB601863 | A7I9H6 | Putative uncharacterized protein |
| [A] Methanocorpusculum labreanum (strain ATCC 43576 / DSM 4855 / Z) | METLZ01556 | A2STS8 | Chaperonin Cpn60/TCP-1 |
| [A] Methanoculleus marisnigri (strain ATCC 35101 / DSM 1498 / JR1) | METMJ01935 | A3CWY5 | Hypothetical protein |
| [A] Methanosphaerula palustris (strain ATCC BAA-1556 / DSM 19958 / E1-9c) | METPE00526 | B8GEV5 | Putative uncharacterized protein |
| [A] Methanospirillum hungatei (strain JF-1 / DSM 864) | METHJ02879 | Q2FSB1 | Protein of unknown function DUF655 |
| [A] Methanococcoides burtonii (strain DSM 6242) | METBU00811 | Q12XH6 | Hypothetical protein |
| [A] Methanosarcina acetivorans | METAC01381 | Q8TQU7 | Putative uncharacterized protein |
| [A] Methanosarcina barkeri (strain Fusaro / DSM 804) | METBF03096 | Q466S7 | conserved hypothetical protein |
| [A] Methanosarcina mazei | METMA02482 | Q8PU19 | Putative uncharacterized protein |
| [A] Methanopyrus kandleri | METKA01657 | Q8TUU5 | Predicted RNA-binding protein |
| [A] Pyrococcus abyssi | PYRAB00377 | Q9V1P9 | Predicted RNA-binding protein |
| [A] Pyrococcus furiosus | PYRFU01850 | Q8TZW3 | DNA-binding protein |
| [A] Pyrococcus horikoshii | PYRHO01888 | O59486 | Putative uncharacterized protein PH1822 |
| [A] Thermococcus kodakaraensis | PYRKO00894 | Q5JI53 | hypothetical protein, conserved, DUF655 family |
| [A] Thermococcus onnurineus (strain NA1) | THEON00410 | B6YTK6 | Putative uncharacterized protein |
| [A] Picrophilus torridus | PICTO00387 | Q6L230 | Putative uncharacterized protein |
| [A] Thermoplasma acidophilum | THEAC01275 | Q9HIN6 | Putative uncharacterized protein Ta1299 |
| [A] Thermoplasma volcanium | THEVO00316 | Q97BY9 | Putative uncharacterized protein TVG0323462 |
| [A] Uncultured methanogenic archaeon RC-I | UNCMA00800 | Q0W2E7 | conserved hypothetical protein |