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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Int J Biochem Cell Biol. 2012 Aug 10;45(1):34–40. doi: 10.1016/j.biocel.2012.08.009

Figure 1. Schematic representation of oxidative phosphorylation and the mitochondrial respiratory chain enzyme complexes.

Figure 1

The respiratory chain enzymes, embedded in the mitochondrial inner membrane (MIM), couple the transport of electrons through the electron transport chain complexes (CI-CIV) to ATP production by CV. Protons extruded into the intermembrane space (IMS) by CI, CIII and CIV create an electrochemical gradient that is utilized by CV, capturing this energy by phosphorylation of ADP while translocating protons back to the mitochondrial matrix.

Other abbreviations: CoQ (coenzyme Q10, ubiquinone), cytC (cytochrome C).