Electron Transport & Oxidative Phosphorylation: Difference between revisions
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NADH + Q + 5H<sup>+</sup>(matrix) ⟶ NAD<sup>+</sup> + QH<sub>2</sub> +4H<sup>+</sup>(intermembrane) | NADH + Q + 5H<sup>+</sup>(matrix) ⟶ NAD<sup>+</sup> + QH<sub>2</sub> +4H<sup>+</sup>(intermembrane) | ||
The start of the reaction, and indeed of the entire electron chain, is the binding of a NADH molecule to complex I and the donation of two electrons. The electrons enter complex I via a prosthetic group attached to the complex, flavin mononucleotide (FMN). The addition of electrons to FMN converts it to its reduced form, FMNH2. The electrons are then transferred through a series of iron–sulfur clusters: the second kind of prosthetic group present in the complex. There are both [2Fe–2S] and [4Fe–4S] iron–sulfur clusters in complex I. | |||
'''Complex III''' | '''Complex III''' | ||