Reaction catalyzed by 4,4'-diapophytoene desaturase (4,4'-diapolycopene-forming) (1.3.8.2)

		+	3	FAD	=			+	3	FADH2
	15-cis-4,4'-diapophytoene	+		3 FAD	=		all-trans-4,4'-diaponeurosporene	+		3 FADH2