Complex I (NADH:ubiquinone oxidoreductase) is a protein complex that has been found to reside in the membrane of bacterium and in mitochondria of Eukaryotes. This complex is a major player in the respiratory chains of these organisms. Complex I catalyzes the transfer of two electrons from NADH to quinone, coupled to the translocation of about four protons across the membrane, helping to provide the proton-motive force required for the synthesis of adenosine triphosphate (ATP). You can provide an image.
| Overview of complex I peripheral arm | Page 1 |
| NADH-binding Cavity and Fe-S clusters | Page 2 |
| 8 Subunits of the peripheral arm | Page 3 |
| Helix H1 of Nqo6 | Page 4 |
| Frataxin Family fold | Page 5 |
| Nqo2 4 Helix bundle compared to human growth hormone | Page 6 |
| Nqo4 4 helix Bundle compared to Nqo2 4 helix bundle | Page 7 |
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