cryo-em structure of a respiratory membrane-bound hydrogenase from pyrococcus furiosus

cryo-em 3d antiporter atp synthesis bacterium biochemistry biology cell membrane chemistry color complex cytochrome dehydrogenase digital electron transport chain energy transfer enzyme extracellular gaussian graphic helix hydrogenase hyperthermophile intracellular isolated model molecule oxidoreductase prokaryote protein pyrococcus quaternary science secondary shape structure subunit tertiary white background