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Taq DNA Polymerase from Thermus aquaticus

with 10× PCR reaction buffer containing MgCl2

CAS Number:
Enzyme Commission number:
MDL number:

Quality Level


expressed in E. coli




sufficient for 10000 reactions
sufficient for 3000 reactions
sufficient for 500 reactions

mol wt

94 kDa


dNTPs included: no
hotstart: no


5 units/μL


PCR: suitable




purified DNA


suitable for PCR and automated sequencing reactions



shipped in

wet ice

storage temp.


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General description

Taq DNA Polymerase is a thermostable enzyme derived from the thermophilic bacterium Thermus aquaticus. The enzyme is in a recombinant form, expressed in E. coli. It can withstand repeated heating to 95 °C without significant loss of activity. Each lot of Taq DNA Polymerase is tested for PCR amplification and double-stranded sequencing.


Taq DNA Polymerase from Thermus aquaticus has been used:
  • in the quantification of fungal growth by polymerase chain reaction (PCR) and photometric assay
  • in conventional reverse transcriptase (RT)-PCR
  • in simple sequence repeats (SSR) genotyping
  • as a component of PCR mix for amplification of genomic and mitochondrial DNA
  • in direct tetra-primer amplification refractory mutation system (T-ARMS) PCR to amplify dried whole blood samples

Biochem/physiol Actions

Taq polymerase catalyzes oligonucleotide primer-driven, DNA template dependent incorporation of dNTPs into complimentary DNA strands. It displays both 5′ to 3′ polymerase and exonuclease activities.

Features and Benefits

  • Low per unit cost of Taq


Taq DNA Polymerase with 10× reaction buffer containing MgCl2
Taq DNA polymerase comes with the choice of an optimized 10× reaction buffer including MgCl2 (D1806) or a 10× reaction buffer without MgCl2 plus a separate tube of MgCl2 for titration (D4545). The latter option may be necessary to determine optimal conditions for amplification.

Other Notes

Taq DNA Polymerase is a specialized thermostable enzyme isolated from the thermophilic bacterium Thermus aquaticus. The recombinant form of this enzyme is expressed in E. coli. This 94 kDa protein shows no detectable levels of contaminating endonucleases or exonucleases by SDS-PAGE. It has both 5′→3′ polymerase and exonuclease activity.

Unit Definition

One unit will incorporate 10 nmol of total dNTPs into acid-precipitable DNA in 30 min at 74 °C.

Legal Information

Use of this product is covered by one or more of the following US patents and corresponding patent claims outside the US: US 8,404,464 and US 7,972,828. The purchase of this product includes a limited, non-transferable immunity from suit under the foregoing patent claims.

Storage Class Code

12 - Non Combustible Liquids



Certificate of Analysis

Certificate of Origin

Severine Hurni et al.
The Plant journal : for cell and molecular biology, 76(6), 957-969 (2013-10-16)
The improvement of wheat through breeding has relied strongly on the use of genetic material from related wild and domesticated grass species. The 1RS chromosome arm from rye was introgressed into wheat and crossed into many wheat lines, as it
Melek Chaouch et al.
Parasite epidemiology and control, 14, e00212-e00212 (2021-05-18)
Leishmaniases are caused by protozoan parasites of the genus Leishmania transmitted by females blood-feeding phlebotomine insects (Diptera: Psychodidae). In Tunisia, cutaneous and visceral leishmaniases are of public health concern. In Tunisia, 17 species of phlebotomine sand flies are described. Here
Lactic acid bacteria bioprotection applied to the malting process. Part II: Substrate impact and mycotoxin reduction
Oliveira P, et al.
Food Control, 51, 444-452 (2015)
Fundamental study on the influence of Fusarium infection on quality and ultrastructure of barley malt
Oliveira P M, et al.
International Journal of Food Microbiology, 156(1), 32-43 (2012)
Human endogenous retrovirus family HERV-K (HML-2) RNA transcripts are selectively packaged into retroviral particles produced by the human germ cell tumor line Tera-1 and originate mainly from a provirus on chromosome 22q11. 21
Ruprecht K, et al.
Journal of Virology, 82(20), 10008-10016 (2008)


Introduction and Historical Timelines

Learn about the history of the polymerase chain reaction (PCR), from the basic principles that proceeded its discovery to the awarding of a Nobel Prize for Chemistry and more recent developments such as real-time PCR (qPCR) and digital PCR.


dNTP Mediated Hot Start PCR Protocol

Hot Start dNTPs are modified with a thermolabile protecting group at the 3’ terminus. The presence of this modification blocks nucleotide incorporation by DNA polymerase until the nucleotide protecting group is removed during a heat activation step.

Standard PCR Protocol

Learn standard PCR protocol steps and review reagent lists or cycling parameters. This method for routine PCR amplification of DNA uses standard Taq DNA polymerase.

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