all-trans-zeta-carotene + A = all-trans-neurosporene + AH2
all-trans-zeta-carotene + a = all-trans-neurosporene + ah2
all-trans-zeta-carotene + A = all-trans-neurosporene + AH2
all-trans-zeta-carotene + a = all-trans-neurosporene + ah2