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Oxygen transport, oxygen storage and oxygen activation in aerobic organisms depend on the iron porphyrin moiety in heme proteins. Under fluctuating oxygen supply and pH decrease the heme pigments like myoglobin and hemoglobin become catalytic in lipid peroxidation by mechanisms different from mechanisms for lipid oxidation by the non-heme-iron lipoxygenase, which is pivotal in energy metabolism. Simpler...
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