The mitochondrial inner membrane - the electrons are transferred from the mitochondrial matrix to the intermembrane space.
The exergonic transfer of electrons powers the transfer of protons into the intermembrane space. The protons flow down their concentration gradient to power the endergonic synthesis of ATP.
The accept electrons from intermediates of the citric acid cycle, and
They donate electrons to the electron transport chain.
NADPH is different from NADH, they do not donate electrons to the electron transport chain, they donate electrons to power anabolic reactions in the cytosol.
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