purine imidazole-ring cyclase activity
purine imidazole-ring cyclase activity
DNA-4,6-diamino-5-formamidopyrimidine 8-C,9-N-lyase (cyclizing; DNA-adenine-forming)
dna-4,6-diamino-5-formamidopyrimidine 8-c,9-n-lyase (cyclizing; dna-adenine-forming)