9,9'-Dicis-zeta-carotene desaturase

9,9'-dicis-zeta-carotene desaturase (, zeta-carotene desaturase, ZDS) is an enzyme with systematic name 9,9'-dicis-zeta-corotene:quinone oxidoreductase. This enzyme catalyses the following chemical reaction


 * 9,9'-dicis-zeta-carotene + 2 quinone $$\rightleftharpoons$$ 7,9,7',9'-tetracis-lycopene + 2 quinol (overall reaction)
 * (1a) 9,9'-dicis-zeta-carotene + a quinone $$\rightleftharpoons$$ 7,9,9'-tricis-neurosporene + a quinol
 * (1b) 7,9,9'-tricis-neurosporene + a quinone $$\rightleftharpoons$$ 7,9,7',9'-tetracis-lycopene + a quinol

This enzyme is involved in carotenoid biosynthesis in plants and cyanobacteria.