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Molecular Biology

Products >  Molecular_Biology >  Modifying_Enzymes >  Ligases >  DNA_Ligase_E_coli

E. coli DNA Ligase

E. coli DNA Ligase catalyzes the formation of phosphodiester bonds between double-stranded DNA fragments containing juxtaposed 5'-phosphate termini and 3'-hydroxyl termini in the presence of the NAD cofactor. Both T4 DNA Ligase and E.coli DNA Ligase are used in various gene cloning experiments;  however, unlike T4 DNA Ligase, E. coli DNA Ligase can only catalyze ligation of cohesive end-containing DNA fragments via standard reaction conditions. E. coli DNA Ligase is supplied in a buffer containing 10 mM potassium phosphate (pH 7.5), 50 mM KCl, 1 mM DTT, 1 mM EDTA and 50% glycerol.

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  • Gene cloning
  • Ligation
  • Phosphodiester bond formation


Recombinant E. coli



Unit Definition

One unit is defined as the amount of enzyme that ligates >90% of 6 µg of Hind III-restricted DNA fragments in 30 minutes and 16°C (using a 20 ul reaction volume).


  1. Panasenko, S.M. et al. (1978) J. Biol. Chem. 253:4590-4592.


50-100 U/µL

Cat. # Product Contents Size Price Units Select
2160A E. coli DNA Ligase 1,000 Units $80.00
2160B E. coli DNA Ligase 5,000 Units $315.00



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