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

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