Succinate Dehydrogenase (SDH), also known as Complex II, is a crucial enzyme in the mitochondrial inner membrane. It plays a dual role in both the Krebs cycle (citric acid cycle) and the electron transport chain (ETC). SDH catalyzes the oxidation of succinate to fumarate, facilitating the transfer of electrons to the electron transport chain, where they are ultimately used to generate ATP, the cell's energy currency.
