Exonuclease I, E. coli
An exonuclease that digests single-stranded DNA but not double-stranded DNA, in a 3' to 5' direction.
Exonuclease III
Digest duplex DNA in a 3´ to 5´ direction from a nick, blunt end, or 3´-recessed end, producing stretches of ssDNA.
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