Tags: Enzyme.
In enzymology a purine imidazole-ring cyclase (EC 4.3.2.4) is an enzyme that catalyzes the chemical reactionDNA 46-diamino-5-formamidopyrimidine DNA adenine + H2OHence this enzyme has one substrate DNA 46-diamino-5-formamidopyrimidine and two products DNA adenine and H2O.This enzyme belongs to the family of lyases specifically amidine lyases. The systematic name of this enzyme class is DNA-46-diamino-5-formamidopyrimidine C8-N9-lyase (cyclizing DNA-adenine-forming).