Reaction catalyzed by phytoene desaturase (neurosporene-forming) (1.3.99.28), phytoene desaturase (lycopene-forming) (1.3.99.31)

		+		FAD	=			+		FADH2
	15-cis-phytoene	+		FAD	=		all-trans-phytofluene	+		FADH2