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Key

NADH dehydrogenase catalyzes electron transport from NADH to ubiquinone. It contains a large number of subunits, fourteen of which are conserved across species. It contains a transmembrane portion (with 7 conserved subunits), which carries electrons to ubiquinone, and a soluble portion (with 7 conserved subunits) which accepts electrons from NADH. These electrons are transferred to a flavin mononucleotide (FMN). They are then sequentially transferred to a Fe-S cluster chain . The model shown only includes a soluble moiety of the complex. Reduction of ubiquinone to ubiquinol by the electrons carried by the Fe-S clusters cannot be shown, since it occurs in the membrane portion of the complex, of which the three-dimensional structure is still unknown.

Other interactive models:

Cytochrome bc1 complex Cytochrome c oxidase Succinate dehidrogenase Anti-parallel β-sheet α-helix Parallel β-sheet Hemoglobin Oxyhemoglobin (I) Oxyhemoglobin (II)

Metabolic pathways:

Metabolic regulation and integration Fatty acids metabolism Glycolysis Citric acid cycle Fermentation and respiration Glycogen synthesis and glycogenolysis Gluconeogenesis Aminoacid degradation and urea cycle Pentose phosphate pathway

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