4,4'-diapophytoene desaturase (4,4'-diaponeurosporene-forming) activity obsolete 4,4'-diapophytoene desaturase (4,4'-diapolycopene-forming) https://github.com/geneontology/go-ontology/issues/23557 true pg 2022-06-24T13:47:06Z 4,4'-diapophytoene desaturase activity GO:0140868 OBSOLETE. Catalysis of the reaction: 3 H+ + 15-cis-4,4'-diapophytoene + 3 FAD = 4,4'-diapolycopene + 3 FADH2. This reaction consists of three successive dehydrogenations that lead to the introduction of three double bonds into 4,4'-diapophytoene (dehydrosqualene), with 4,4'-diapophytofluene and 4,4'-diapo-zeta-carotene as intermediates, and 4,4'-diaponeurosporene (the major deep-yellow pigment in staphylococci strains) as the end product. molecular_function This term was obsoleted because the reaction it represents may not be physiologically relevant.