| [A] Hyperthermus butylicus (strain DSM 5456 / JCM 9403) | HYPBU00705 | A2BKS5 | Pyruvate oxidoreductase gamma subunit |
| [A] Metallosphaera sedula (strain ATCC 51363 / DSM 5348) | METS500505 | A4YE30 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [A] Sulfolobus islandicus (strain L.S.2.15 / Lassen #1) | SULIL00385 | C3ML14 | |
| [A] Sulfolobus islandicus (strain M.14.25 / Kamchatka #1) | SULIM00362 | C3MUM0 | |
| [A] Sulfolobus islandicus (strain M.16.27) | SULIA00369 | C3N1Y9 | |
| [A] Sulfolobus islandicus (strain Y.G.57.14 / Yellowstone #1) | SULIY00374 | C3N9Y5 | |
| [A] Sulfolobus islandicus (strain Y.N.15.51 / Yellowstone #2) | SULIN02349 | C3NLP0 | |
| [A] Sulfolobus solfataricus | SULSO01085 | Q97YU7 | Pyruvate synthase gamma chain |
| [A] Sulfolobus tokodaii | SULTO01651 | Q970S1 | hypothetical pyruvate ferredoxin oxidoreductase |
| [A] Thermofilum pendens (strain Hrk 5) | THEPD00536 | A1RXL6 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [A] Methanoregula boonei (strain 6A8) | METB600202 | A7I4R5 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [A] Methanocorpusculum labreanum (strain ATCC 43576 / DSM 4855 / Z) | METLZ00048 | A2SPH0 | Hypothetical protein |
| [A] Methanoculleus marisnigri (strain ATCC 35101 / DSM 1498 / JR1) | METMJ02293 | A3CXZ3 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [A] Methanosphaerula palustris (strain ATCC BAA-1556 / DSM 19958 / E1-9c) | METPE02586 | B8GFU9 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [A] Methanospirillum hungatei (strain JF-1 / DSM 864) | METHJ02268 | Q2FT06 | 2-oxoacid:acceptor oxidoreductase, gamma subunit, pyruvate/2-ketoisovalerate |
| [A] Thermococcus kodakaraensis | PYRKO01972 | PORC_PYRKO | pyruvate/2-oxoisovalerate: ferredoxin oxidoreductases, common gamma subunit |
| [A] Thermoplasma acidophilum | THEAC00617 | Q9HKH3 | Probable pyruvate ferredoxin oxidoreductase, gamma subunit |
| [A] Uncultured methanogenic archaeon RC-I | UNCMA00378 | Q0W164 | pyruvate:ferredoxin oxidoreductase, gamma subunit |
| [A] Korarchaeum cryptofilum (strain OPF8) | KORCO01511 | B1L742 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [B] Moorella thermoacetica (strain ATCC 39073) | MOOTA01869 | Q2RH65 | 2-oxoacid:acceptor oxidoreductase, gamma subunit, pyruvate/2-ketoisovalerate |
| [B] Desulfococcus oleovorans (strain DSM 6200 / Hxd3) | DESOH01384 | A8ZYU3 | Pyruvate/ketoisovalerate oxidoreductase, gamma subunit |
| [B] Syntrophus aciditrophicus (strain SB) | SYNAS02081 | Q2LV76 | pyruvate synthase gamma chain |