Reaction catalyzed by DNA-formamidopyrimidine glycosylase (3.2.2.23)

	DNA containing 5-hydroxy-5-methylhydantoin residues opposite cytosine	+		H2O	=			+
	DNA containing 5-hydroxy-5-methylhydantoin residues opposite cytosine	+		H2O	=		5-hydroxy-5-methylhydantoin	+		DNA