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The high concentration of protons in the inner mitochondrial space relative to the mitochondrial matrix represents what kind
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The higher concentration of protons in the inner mitochondrial membrane and a lower concentration of protons in matrix ,because of proton gradient developed across inner mitochondrial membrane with higher concentration of protons and relatively lower amount of protons in matrix.This gradient shows stroed form of energy and this energy is used in making ATP molecules from ADP.

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As proton flow through the ATP synthase complex in the inner membrane ,energy is released and exploited to combine ADP and inorganic phosphate and make ATP.

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