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Medical Definition of Coproporphyrinogen
1. See: porphyrinogens. Coproporphyrinogen oxidase, an enzyme that catalyses a step in porphyrin biosynthesis, reacting coproporphyrinogen-III and O2 to form protoporphyrinogen-IX and 2CO2. A deficiency of this enzyme will result in hereditary coproporphyria. (05 Mar 2000)