<P> In the mitochondrial electron transport chain electrons move from an electron donor ( NADH or QH ) to a terminal electron acceptor ( O ) via a series of redox reactions . These reactions are coupled to the creation of a proton gradient across the mitochondrial inner membrane . There are three proton pumps : I , III , and IV . The resulting transmembrane proton gradient is used to make ATP via ATP synthase . </P>
<P> In the mitochondrial electron transport chain electrons move from an electron donor ( NADH or QH ) to a terminal electron acceptor ( O ) via a series of redox reactions . These reactions are coupled to the creation of a proton gradient across the mitochondrial inner membrane . There are three proton pumps : I , III , and IV . The resulting transmembrane proton gradient is used to make ATP via ATP synthase . </P>
where are protons pumped in electron transport chain
where are protons pumped in electron transport chain
across the mitochondrial inner membrane
across the mitochondrial inner membrane