This enzyme belongs to the family of transferases that transfer one-carbon groups, specifically the hydroxymethyl-, formyl- and related transferases. The systematic name of this enzyme class is 5-formimidoyltetrahydrofolate:glycine N-formimidoyltransferase. Other names in common use include formiminoglycine formiminotransferase, FIG formiminotransferase, and glycine formiminotransferase. This enzyme participates in purine metabolism and one carbon pool by folate.
Rabinowitz JC; Pricer WE (1956). "Formiminotetrahydrofolic acid and methenyltetrahydrofolic acid as intermediates in the formation of N10-formyltetrahydrofolic acid". J. Am. Chem. Soc. 78 (21): 5702–5704. doi:10.1021/ja01602a073.
Rabinowitz JC; Pricer WE (1957). "Formation, isolation and properties of 5-formiminotetrahydrofolic acid". Fed. Proc. 16: 236.