Thermus aquaticus (Taq) DNA polymerase, recombinant Cat.#


Data Sheet

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Taq DNA Polymerase (recombinant form of the enzyme from the thermophilic eubacterium Thermus aquaticus strain YT-1) consists of a single polypeptide chain with a molecular weight 94 kDa. It is a highly processive 5'-3' DNA polymerase lacking 3'-5' exonuclease activity. The enzyme is highly purified and is free of nonspecific endo- and exonucleases. This Taq DNA polymerase has a nontemplate-dependent activity, which adds a single deoxyadenosine (A) to the 3' ends of PCR products (3'-A overhangs). This property allows easily and efficiently to ligate the PCR products in TA cloning vectors. Amplification of target DNA fragments from 100 bp to 4 Kb can be achieved with this enzyme.

Storage and dilution buffer:

20 mM Tris-HCl, pH 7.9, 125 mM KCl, 1 mM EDTA, 0.1 mM DTT, 0.5 % Tween 20, 50 % glycerol.

Unit definition:

One unit of activity is the amount of enzyme required to incorporate 10 nmoles of dNTP into acid-insoluble material in 30 minutes at 72 °C.

Reaction buffer 10x (Mg2+ minus):

670 mM Tris-HCl, pH 8.8, 166 mM (NH4)2SO4, 0.1 % Tween 20.

Other common PCR buffers for Taq-DNA polymerases can be used as well.

Optimal concentration of MgCl2 is 1.0-2.5 mM.


PCR and DNA labelling.

Quality control:

Activity, SDS-PAGE purity, absence of endonucleases/nickases and exonucleases.


5 units/µl


-20 °C (-15 … -30 °C allowed)

Material safety note:

This product is sold for research use only. Standard Laboratory Practices should be followed when handling this material.

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