Catalysis of the hydrolysis of ester linkages immediately 5' to an apurinic/apyrimidinic (AP; also called abasic) site within a deoxyribonucleic acid molecule by creating internal breaks, generating a single-strand break with 5'-deoxyribose phosphate and 3'-hydroxyl ends.
Comment:
Class II AP endonuclease is a nuclease, but not Class I, III and IV.
Synonyms:
exact_synonym:
class II DNA-(apurinic or apyrimidinic site) lyase activity