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Recombinant Nucleases

NUC00500-01 - Recombinant Exonuclease III, 0.5ml


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Recombinant Exonuclease III: Enzyme useful for nested unidirectional deletions, generation of a single-stranded templates, site-directed mutagenesis and other cloning tasks.

Exonuclease III (ExoIII) of E. coli is a 31 kD monomeric, globular protein combining multiple catalytic activities in one active site. It acts on doublestranded (ds) DNA as a 3'-5' exonuclease, a 3'- phosphomonoesterase, an apurinic/apyrimidimic (AP) sites specific endonuclease and an exonucleolytic ribonuclease H. Of particular interest for molecular biological methods is its exonucleolytic activity, removing 5'-mononucleotides from the 3'-hydroxyl ends of ds DNA, leaving protruding 5'-termini. Its catalytic rate can be adjusted by temperature and NaCl concentration and thus allows for the generation of single-stranded DNA templates for sequencing or recombination methods.

0.5ml (>10U/μl)

  • Construction of nested unidirectional deletions of DNA fragments in combination with nuclease S1
  • Generation of a single-stranded template for dideoxy sequencing of DNA
  • Site-directed mutagenesis
  • Cloning of PCR products
  • In vitro recombination