Compound as reactive (1)

FAD + 15-cis-4,4'-diapophytoene + H⁺ → FADH₂ + all-trans-4,4'-diapophytofluene

Compound as product (3)

presqualene diphosphate → 15-cis-4,4'-diapophytoene + diphosphate

2 (2E,6E)-farnesyl diphosphate → 2 diphosphate + 15-cis-4,4'-diapophytoene

squalene + an oxidized electron donor → 15-cis-4,4'-diapophytoene + a reduced electron donor

Reversible reaction (2)

3 FAD + 3 H⁺ + 15-cis-4,4'-diapophytoene ↔ 3 FADH₂ + all-trans-4,4'-diaponeurosporene

4 FAD + 4 H⁺ + 15-cis-4,4'-diapophytoene ↔ 4 FADH₂ + all-trans-4,4'-diapolycopene