purine imidazole-ring cyclase activity
purine imidazole-ring cyclase activity
DNA-4,6-diamino-5-formamidopyrimidine C8-N9-lyase (cyclizing; DNA-adenine-forming)
dna-4,6-diamino-5-formamidopyrimidine c8-n9-lyase (cyclizing; dna-adenine-forming)