5ODC Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus at 2.3 A resolution Methanothermococcus thermolithotrophicus DSM 2095 5ODH Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus soaked with heterodisulfide for 3.5 minutes Methanothermococcus thermolithotrophicus DSM 2095 5ODI Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus cocrystallized with CoM-SH Methanothermococcus thermolithotrophicus DSM 2095 5ODQ Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus soaked with bromoethanesulfonate. Methanothermococcus thermolithotrophicus DSM 2095 5ODR Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus soaked with heterodisulfide for 2 minutes. Methanothermococcus thermolithotrophicus DSM 2095 7BKB Formate dehydrogenase - heterodisulfide reductase - formylmethanofuran dehydrogenase complex from Methanospirillum hungatei (hexameric, composite structure) Methanospirillum hungatei JF-1 7BKC Formate dehydrogenase - heterodisulfide reductase - formylmethanofuran dehydrogenase complex from Methanospirillum hungatei (dimeric, composite structure) Methanospirillum hungatei JF-1 7BKD Formate dehydrogenase - heterodisulfide reductase - formylmethanofuran dehydrogenase complex from Methanospirillum hungatei (heterodislfide reductase core and mobile arm in conformational state 1, composite structure) Methanospirillum hungatei JF-1 7BKE Formate dehydrogenase - heterodisulfide reductase - formylmethanofuran dehydrogenase complex from Methanospirillum hungatei (heterodisulfide reductase core and mobile arm in conformational state 2, composite structure) Methanospirillum hungatei JF-1