| Reaction catalyzed by all-trans-zeta-carotene desaturase (1.3.99.26), phytoene desaturase (neurosporene-forming) (1.3.99.28), phytoene desaturase (3,4-didehydrolycopene-forming) (1.3.99.30), phytoene desaturase (lycopene-forming) (1.3.99.31) |
 |
| + | = | + | ||||||||
| + | = | + |