Reaction catalyzed by phosphoribosylglycinamide formyltransferase 1 (2.1.2.2)

		+			=			+
	N10-formyldideazafolate	+		5-phospho-D-ribosylglycinamide	=		dideazafolate	+		5'-phosphoribosyl-N-formylglycinamide