Reaction catalyzed by methylenetetrahydrofolate dehydrogenase (NADP+) (1.5.1.5)

		+		NADP+	=			+		NADPH
	5,10-methylenetetrahydropteroyltriglutamate	+		NADP+	=		5,10-methenyltetrahydropteroyltriglutamate	+		NADPH