FAD (Flavin Adenine Dinucleotide) is a redox-active coenzyme involved in several important metabolic reactions. It functions as an electron carrier in cellular respiration and other biochemical pathways.
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FAD is reduced to FADH2 during the Krebs cycle.
FADH2 donates electrons to the electron transport chain, contributing to ATP production.
Unlike NAD+, FAD is often covalently bound to enzymes it assists.
FAD is synthesized from riboflavin (vitamin B2).
In the Krebs cycle, FAD participates in the oxidation of succinate to fumarate.