Reaction catalyzed by all-trans-zeta-carotene desaturase (1.3.99.26), phytoene desaturase (3,4-didehydrolycopene-forming) (1.3.99.30), phytoene desaturase (lycopene-forming) (1.3.99.31)

		+		acceptor	=			+		reduced acceptor
	all-trans-neurosporene	+		acceptor	=		all-trans-lycopene	+		reduced acceptor