Tags: Enzyme.
Protoporphyrinogen oxidase (EC 1.3.3.4) is an enzyme that is responsible for the seventh step in biosynthesis of protoporphyrin IX. This porphyrin is the precursor to hemoglobin the oxygen carrier in animals and chlorophyll the dye in plants. The enzyme catalyzes the dehydrogenation (removal of hydrogen atoms) of protoporphyrinogen IX (the product of the sixth step in the production of heme) to form protoporphyrin IX.
