Reaction catalyzed by phosphoribosylglycinamide formyltransferase 1 (2.1.2.2)
+
=
+
10-formyltetrahydrofolate
+
O-phosphonate carbocyclic glycinamide ribonucleotide
=
tetrahydrofolate
+
O-phosphonate-ribosyl-N-formylglycinamide