| R04798 | [Fig] | zeta-Carotene | <=> | Neurosporene + H2 |
| R04800 | [Fig] | Neurosporene + Reduced acceptor + O2 | <=> | Lycopene + Acceptor + 2 H2O |
| R04803 | [Fig] | beta-Zeacarotene + Acceptor | <=> | gamma-Carotene + H2 + Reduced acceptor |
| R06961 | [Fig] | C14146 | <=> | delta-Carotene |