Exonuclease I, E. coli, 20 U/µL, 20,000 UAn exonuclease that digests single stranded DNA but not double stranded DNA, in a 3' to 5' direction. Exonuclease I is supplied as enzyme only with no reaction buffer included. Key features Specific: Processively digest ssDNA in a 3 to 5 direction without harming dsDNA short 3 overhangs in DNA are not digested Flexible: Active under a wide variety of buffer conditions and can be added directly into most reaction mixes Heat Inactivated: Destroy the