Previously added items:
Thermo Scientific Exonuclease I (ExoI) degrades single-stranded DNA in a 3'=>5' direction. It releases deoxyribonucleoside 5'-monophosphates in a stepwise manner and leaves 5'-terminal dinucleotides intact.
It does not cleave DNA strands with terminal 3'-OH groups blocked by phosphoryl or acetyl groups (see Reference 1).
The enzyme is not suitable for removing 3'-overhangs of dsDNA.