ID 1.3.5.3 DE protoporphyrinogen IX dehydrogenase (quinone). AN protoporphyrinogen IX dehydrogenase (menaquinone). CA 3 a quinone + protoporphyrinogen IX = 3 a quinol + protoporphyrin IX. CC -!- Contains FMN. CC -!- The enzyme participates in heme b biosynthesis. CC -!- In the bacterium Escherichia coli it interacts with either ubiquinone CC or menaquinone, depending on whether the organism grows aerobically CC or anaerobically. DR P0ACB6, HEMG_ECO57 ; P0ACB5, HEMG_ECOL6 ; P0ACB4, HEMG_ECOLI ; DR Q4QIU7, HEMG_LEIMA ; Q9L6L1, HEMG_SALTY ; //