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Thermo Scientific™ Klenow Fragment, exo-

Klenow Fragment, exo- is the large fragment of DNA polymerase I. Exhibits 5'→3' polymerase activity, but lacks the 3'→5' and 5'→3' exonuclease activities.

Brand:  Thermo Scientific™ EP0421

UNSPSC : 12352204

Code : 88

Additional Details : Weight : 1.51950kg

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Product Code. 10669880

  • £54.50 / 300 units

EU Stock 9
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  • Lacks 3'→5' exonuclease activity
  • Incorporates modified nucleotides (e.g., Cy3-, Cy5-, fluorescein-, rhodamine-, aminoallyl-, biotin-labeled nucleotides)
  • Active in restriction enzyme, PCR, and RT buffers


  • Random-primed DNA labeling
  • Labeling by fill-in 5'-overhangs of dsDNA
  • Strand displacement amplification (SDA)
  • DNA sequencing by the Sanger method


Klenow Fragment, exo- is not recommended for DNA blunting reactions prior to DNA ligation since it frequently adds one or more extra nucleotides to the 3'-terminus of blunt-end DNA substrates in a non-template directed fashion

Description & Specifications


E.coli cells with a cloned DNA fragment of the mutated polA gene
metal chelators, PPi, Pi (at high concentrations) (7)
68kDa monomer