<p>Exonuclease VII <db_xref db="EC" dbkey="3.1.11.6"/> is composed of two nonidentical subunits; one large subunit and 4 small ones [<cite idref="PUB00008230"/>].Exonuclease VII catalyses exonucleolytic cleavage in either 5'-3' or 3'-5' direction to yield 5'-phosphomononucleotides. The large subunit also contains the OB-fold domains (<db_xref db="INTERPRO" dbkey="IPR004365"/>) that bind to nucleic acids at the N terminus.</p> Exonuclease VII, large subunit