Home » Product » Reagent and Kit » PCR Reagent » HotStart Taq DNA Polymerase


HotStart Taq DNA Polymerase


The HotStart Taq DNA Polymerase is a chemically modified Taq DNA Polymerase, whose enzyme activities can only be activated after 3-5 minutes of incubation at 94oC. The HotStart Taq Polymerase uses amplification conditions for regular Taq DNA Polymerase, except no polymerase activity will be present before the onset of thermal cycling. This prevents nonspecific DNA amplification and primer dimer formation. The amplified products, up to 6 kb in length, contain single 3’-overhanging-A ends. This allows for TA cloning methods, if the amplified fragments need to be cloned.

The enzyme is available in 200 and 500 unit sizes at a concentration of 5 U/µL. The enzyme is supplied with a 10× Reaction Buffer.


  • Low non-specific amplification
  • Generate fragments with high specificity
  • Sensitivity to low-concentration templates
  • Ideal for difficult templates


  • Amplification of genomic DNA and cDNA targets
  • Amplification of problematic templates
  • General PCR applications

Product Specifications

  • Storage Buffer: 20 mM Tris-HCl (pH 8.0 at 25oC), 100 mM NaCl, 1 mM DTT, 0.1 mM EDTA, 0.5% (v/v) NP-40, and 50% (v/v) glycerol.
  •  Unit Definition: One unit is defined as the amount of enzyme required to incorporate 10 nmoles of deoxyribonucleotide into DNA in 30 min at 74°C.
  • Unit Assay Conditions: 25 mM TAPS (pH 9.3), 50 mM KCl, 2 mM MgCl2, 1 mM DTT, 0.5 mg/ml activated salmon sperm DNA, 0.2 mM dATP, dCTP, dGTP, dTTP.
  • 10× Reaction Buffer: 200 mM Tris-HCl (pH 8.8), 100 mM KCl, 25 mM MgCl2, and other components.


To Order

Buy Cat. No. Product Name Unit Size Price
D007-1 HotStart Taq DNA Polymerase 1000U $70
D007-2 HotStart Taq DNA Polymerase 5000U $140


Protocol (PDF): D007
MSDS (PDF): msds-D007