Final answer:
NADH is the primer for oxidative phosphorylation in the electron transport chain, removing hydrogen from the reactants involved.
Step-by-step explanation:
Oxidative phosphorylation is the process by which ATP is generated from the transfer of electrons in the electron transport chain. The primer for oxidative phosphorylation, which removes hydrogen from the reactants involved, is NADH.
NADH delivers both protons and electrons to the electron transport chain, where the electrons are transported through a series of enzymes and ultimately reduce oxygen to water, while the protons contribute to the proton motive force used by ATP synthase to produce ATP.