all-trans-lycopene + A <=> all-trans-3,4-didehydrolycopene + AH2
all-trans-lycopene + a <=> all-trans-3,4-didehydrolycopene + ah2
all-trans-lycopene + A <=> all-trans-3,4-didehydrolycopene + AH2
all-trans-lycopene + a <=> all-trans-3,4-didehydrolycopene + ah2