What it means
A carrier molecule made from riboflavin (vitamin B2). In cellular respiration, the citric acid (Krebs) cycle and the breakdown of fats load it with electrons, turning FAD into FADH₂. It then hands those electrons to the electron transport chain in the mitochondria, where their energy is used to make ATP, the cell's energy molecule. It works alongside NADH.
At a glance
| Also written | FADH2 |
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