all-trans-zeta-carotene + AH2 => all-trans-phytofluene + A
all-trans-zeta-carotene + ah2 => all-trans-phytofluene + a
all-trans-zeta-carotene + AH2 => all-trans-phytofluene + A
all-trans-zeta-carotene + ah2 => all-trans-phytofluene + a