The process in which ATP is form as a result of the transfer of electrons from NADH and FADH2 occurs at the inner membrane of the mitochondrion of eukaryotes by a series of electron carriers.

A sequence of electron carrier molecules embedded in inner membrane of mitochondria that shuttle electrons down a series of redox reactions that release energy used to make ATP.

Energy-coupling mechanism that uses energy stored in the form of an H+ gradient across a membrane to drive cellular work.

High concentration of proton (H+) in the intermembrane space of mitochondria resulting in proton gradient across the membrane known as proton-motive force.