Reaction catalyzed by phosphoribosylaminoimidazolecarboxamide formyltransferase (2.1.2.3)

		+			=			+
	N10-formyltetrahydropteroylheptaglutamate	+		5'-phosphoribosyl-5-formamino-4-imidazole carboxamide ribonucleotide	=		tetrahydropteroylglutamate	+		5'-phosphoribosyl-5-formamido-4-imidazole carboxamide ribonucleotide