9,9'-di-cis-zeta-carotene + 2 a quinone => 7,7',9,9'-tetra-cis-lycopene + 2 a quinol
9,9'-di-cis-zeta-carotene + 2 a quinone => 7,7',9,9'-tetra-cis-lycopene + 2 a quinol
9,9'-di-cis-zeta-carotene + 2 a quinone => 7,7',9,9'-tetra-cis-lycopene + 2 a quinol
9,9'-di-cis-zeta-carotene + 2 a quinone => 7,7',9,9'-tetra-cis-lycopene + 2 a quinol