ID 1.3.8.2 DE 4,4'-diapophytoene desaturase (4,4'-diapolycopene-forming). AN 4,4'-diapophytoene desaturase. AN dehydrosqualene desaturase. CA 15-cis-4,4'-diapophytoene + 4 FAD + 4 H(+) = all-trans-4,4'-diapolycopene CA + 4 FADH2. CC -!- The enzyme catalyzes four successive dehydrogenations, resulting in CC production of 4,4'-diapolycopene. CC -!- While the enzyme from Staphylococcus aureus was only shown to produce CC 4,4'-diaponeurosporene in vivo, it is able to catalyze the last CC reaction in vitro. DR Q4VKV1, CRTN_METSP ; //