Biology
The Role of Cofactors in Enzyme-Catalyzed Redox Reactions
Quick fact
NAD+ and FAD are common coenzymes that carry electrons; NAD+ accepts two electrons and one proton to become NADH, while FAD accepts two electrons and two protons to become FADH2.
Why this is interesting
You’ve seen enzymes speed up reactions, but some need an extra helper—like a battery—to make oxidation and reduction happen. What are these helpers, and how do they power the reaction?