Methanocaldococcus jannaschii - 758365 Methanosarcina acetivorans - 733227, 734072 Methanosarcina barkeri - 687410 Methanosarcina mazei O59640: subunit A, P80655: subunit B, O59638: subunit C, P80653: subunit D, P80651: subunit E, P80654: subunit F, P80656: subunit G, P80650: subunit H 727499 Methanosarcina mazei P80655: subunit B, P80653: subunit D, P80651: subunit E, P80654: subunit F, P80656: subunit G, P80650: subunit H 727407 Methanosarcina mazei DSM 3647 O59640: subunit A, P80655: subunit B, O59638: subunit C, P80653: subunit D, P80651: subunit E, P80654: subunit F, P80656: subunit G, P80650: subunit H 727499 Methanosarcina mazei DSM 3647 P80655: subunit B, P80653: subunit D, P80651: subunit E, P80654: subunit F, P80656: subunit G, P80650: subunit H 727407 Methanothermobacter marburgensis - 756076 Methanothermobacter thermautotrophicus - 639489 Methanothermus fervidus - 758365