2 years at -20°C
OptimusTM Hotstart Taq DNA polymerase is a hot-start polymerase with chemical modification, which brings higher specificity by reducing non-specific products as the enzyme activity is temperature-dependent and is inhibited at room temperature. The amplification length and speed can reach to 5 kb (simple template) and 0.5 kb/min separately. Hotstart Taq has 5’-3’ polymerase activity, but no 3’-5’ exonuclease activity. The products of Taq plus have overhanged dA at 3’-end.
OptimusTM Hotstart Taq DNA polymerase has zero animal source pollution by being produced with advanced chemical modification. And it is much more stable than antibody-modified hot-start polymerase. Its efficiency is higher than most chemical-modified polymerase and the initial-denaturation time can be reduced to 3 minutes.
OptimusTM Hotstart Taq DNA polymerase is an innovative and useful product.
One enzyme unit (U) refers to the amount of enzyme needed for intaking 10 nmol nucleotides when using activated salmon sperm DNA as template/primer, at 72 ℃, in 30 minutes
The absence of endonuclease or exonuclease is confirmed by appropriate quality tests. PCR detects no host residual DNA, and it can effectively amplify the single-copy gene of human genome. There is no significant change about the amplification activity after one week at room temperature.
200 mM Tris-HCl, 1 mM DTT, 0.1 mM EDTA, 100 mM KCl, 0.5% Tween 20, 50% Glycerol
0.5% Triton X -100
10X Hotstart Buffer with Mg2+
50 mM KCl, 100 mM Tris-HCl, 200 mM NH4Cl, 20 mM MgCl2
Basic PCR Protocol
The following basic protocol serves as a general guideline and a starting point for any PCR amplification. Optimal reaction conditions (incubation time and temperature, concentration of Taq DNA Polymerase, primers, Mg2+, and template DNA) vary and need to be optimized.
1. Add the following components to a sterile microcentrifuge tube sitting on ice:
2. Mix contents of tube. Cap tubes and centrifuge briefly to collect the contents to the bottom.
When using a thermal cycler that does not contain a heated lid, overlay the reaction mixture with 25 μl mineral oil.
Incubate for an additional 10 min at 72°C and maintain the reaction at 4°C. The samples can be stored at -20°C until use.
Analyze the amplification products by agarose gel electrophoresis and visualize by ethidium bromide staining. Use appropriate molecular weight standards.
1 This product adopts improved chemical modification technology, so it relies on temperature to activate the polymerase activity, which can effectively inhibit non-specific bindings, and the reaction system can be configured at room temperature.
2 This Hotstart Taq DNA polymerase has the deoxidizing nucleotide transfer activity, so at the 3’-end of the PCR product is usually added to an extra deoxygenated adenosine nucleoside.
No detectable conversion of covalently closed circular DNA to a nicked DNA was observed after incubation of 10U OptimusTM Hotstart Taq DNA Polymerase with 1μg pBR322 DNA for 4 hours at 37°C and 70°C.
No detectable degradation of lambda DNA-HindIII fragments was observed after incubation of 10U OptimusTM Hotstart Taq DNA Polymerase with 1μg digested DNA for 4 hours at 37°C and 70°C.
0% of the total radioactivity was released into trichloroacetic acid-soluble fraction after incubation of 10U OptimusTM Hotstart Taq DNA Polymerase with 1μg E.coli [3H]-RNA (40000cpm/μg) for 4 hours at 37°C and 70°C.
Why the specificity of OptimusTM Hotstart Taq DNA polymerase is higher than ordinary Taq DNA polymerase?
The OptimusTM Hotstart Taq DNA polymerase is a chemical modification technique that modifies the ordinary Taq DNA polymerase, which activity is completely inhibited at room temperature and relies on temperature to activate. At low temperature, the enzyme activity is inhibited, but it is activated at high temperature in a very short time. Low temperature inhibition & high temperature activation, so the specificity is better.
Does the product of OptimusTM Hotstart Taq DNA polymerase can be used for TA cloning directly?
Yes. Because the product has 3’-dA end.