Compound as reactive (3)

all-trans-4,4'-diapolycopene + a reduced electron donor + oxygen → an oxidized electron donor + 4-hydroxy-4,4'-diapolycopene + H₂O

4 a reduced electron donor + 4 oxygen + all-trans-4,4'-diapolycopene → 4 an oxidized electron donor + 6 H₂O + 4,4'-diapolycopen-4,4'-dial

2 a reduced electron donor + 2 oxygen + all-trans-4,4'-diapolycopene → 2 an oxidized electron donor + 3 H₂O + 4,4'-diapolycopene-4-al

Compound as product (1)

FAD + all-trans-4,4'-diaponeurosporene + H⁺ → FADH₂ + all-trans-4,4'-diapolycopene

Reversible reaction (1)

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