Phase 5: Spread of disease between humans is occurring in more than one country of one WHO region. Phase 6: Community-level outbreaks are in at least one additional country in a different WHO region from phase 5. A global pandemic is under way.
Figure %: The Electron Transport Chain. The events of the electron transport chain involve NADH and FADH, which act as electron transporters as they flow through the inner membrane space. In complex I, electrons are passed from NADH to the electron transport chain, where they flow through the remaining complexes. NADH is oxidized to NAD in this process.
The electron transport chain is a series of electron carriers in the membrane of the mitochondria in eukaryotic cells. Through a series of reactions, the high energy electrons are passed to oxygen. In the process, a gradient is formed, and ultimately ATP is produced by oxidative phosphorylation. The enzyme ATP synthase uses the energy produced by the electron transport chain for the phosphorylation of ADP to ATP.