| [A] Archaeoglobus fulgidus | ARCFU01047 | MER_ARCFU | 5,10-methylenetetrahydromethanopterin reductase |
| [A] Haloarcula marismortui | HALMA02158 | Q5UZQ6 | F420-dependent N5N10-methylene-tetrahydromethanopterin reductase |
| [A] Haloquadratum walsbyi (strain DSM 16790) | HALWD02225 | Q18FK3 | Coenzyme F420-dependent N(5),N(10)-methylenetetrahydromethanopterin reductase (Methylene-H(4)MPT reductase) |
| [A] Halorubrum lacusprofundi (strain ATCC 49239 / DSM 5036 / JCM 8891 / ACAM 34) | HALLT01646 | B9LPH7 | Luciferase-like monooxygenase |
| [A] Natronomonas pharaonis (strain DSM 2160 / ATCC 35678) | NATPD00526 | Q3ITB5 | monooxygenase (EC 1.14.14.-) (homolog to alkanesulfonate monooxygenase) 1 |
| [A] Methanosphaera stadtmanae (strain DSM 3091) | METST01086 | Q2NF93 | F420-dependent N5,N10-methylenetetrahydromethanopterin reductase |
| [A] Methanoregula boonei (strain 6A8) | METB600522 | A7I5N5 | 5,10-methylenetetrahydromethanopterin reductase |
| [A] Methanocorpusculum labreanum (strain ATCC 43576 / DSM 4855 / Z) | METLZ00076 | A2SPJ8 | Hypothetical protein |
| [A] Methanoculleus marisnigri (strain ATCC 35101 / DSM 1498 / JR1) | METMJ00542 | A3CSZ0 | 5,10-methylenetetrahydromethanopterin reductase |
| [A] Methanosphaerula palustris (strain ATCC BAA-1556 / DSM 19958 / E1-9c) | METPE00313 | B8GJQ5 | 5,10-methylenetetrahydromethanopterin reductase |
| [A] Methanospirillum hungatei (strain JF-1 / DSM 864) | METHJ02135 | Q2FTS9 | Coenzyme F420-dependent N(5),N(10)-methenyltetrahydromethanopterin |
| [A] Methanosarcina acetivorans | METAC03558 | MER_METAC | 5,10-methylenetetrahydromethanopterin reductase |
| [A] Methanosarcina barkeri (strain Fusaro / DSM 804) | METBF00241 | MER_METBF | F420-dependent N5,N10-methylene-tetrahydromethanopterin reductase |
| [A] Methanopyrus kandleri | METKA00524 | MER_METKA | 5,10-methylenetetrahydromethanopterin reductase |