AccuPrime™ SuperMix II is designed for amplification of genomic DNA templates 200 bp–4 kb in size. It is not recommended for amplification of small genomic templates (≤200 bp), plasmid DNA, or cDNA templates.
AccuPrime™ SuperMix II is a specially formulated master mix for the amplification of nucleic acid templates by PCR. The mixture contains recombinant Taq DNA polymerase, anti-Taq antibodies, thermostable AccuPrime™ protein, Mg++, and dNTPs at optimized concentrations. The SuperMix is supplied at 2X concentration to allow for the addition of primers and template.
Anti-Taq DNA polymerase antibodies inhibit polymerase activity at ambient temperatures, allowing room-temperature reaction setup and providing an automatic “hot start” in PCR (Chou et al., 1992; Sharkey et al., 1994). Thermostable AccuPrime™ protein enhances specific primer-template hybridization during every cycle of PCR. Antibody- and AccuPrime™ protein-mediated amplification dramatically improves PCR specificity and fidelity, providing the most robust PCR for multiplex PCR and sub-optimal primer sets.
Reagents are provided for 200 or 1,000 amplification reactions of 25 μl each.
Store at 4°C or –20°C. No reduction of PCR performance or enzyme activity has been observed after storage for 12 months at 4°C. Note that repeated freeze-thaw cycles may reduce enzyme performance.
|200-rxn kit||1,000-rxn kit|
|AccuPrime™ SuperMix II||2 × 1.25 ml||12.5 ml|
40 mM Tris-HCl (pH 8.4); 100 mM KCl; 3 mM MgCl2, 400 μM each dGTP, dATP, dTTP, dCTP; AccuPrime™ Taq DNA Polymerase; thermostable AccuPrime™ protein; stabilizers
Terminal Transferase Activity
Like regular Taq DNA polymerase, AccuPrime™ Taq DNA Polymerase has a nontemplate-dependent terminal transferase activity that adds a single deoxyadenosine (A) to the 3' ends of PCR products.
Guidelines for PCR
General PCR parameters and troubleshooting information are documented in Innis, et al (Innis et al., 1990). PCR reactions should be assembled in a DNA-free environment using clean, dedicated automatic pipettors and aerosol resistant barrier tips. Always keep the control DNA and other templates to be amplified isolated from the other components.
Recommendations for PCR
The protocol on the following page is designed as a starting point for PCR amplification. Optimal reaction conditions—incubation times and temperatures, primers, and template DNA—may vary.
- Starting material: 10 pg to 200 ng of genomic DNA (200 bp–4 kb in size).
- Annealing temperature: In general, the optimal annealing temperature should be 5–10° lower than the Tm of the primers used.
- Program the thermal cycler as follows: Initial denaturation: 94ºC for 2 minutes 25–35 cycles of:
- Denaturation: 94ºC for 15–30 seconds
- Annealing: 55–60ºC for 15–30 seconds
- Extension: 68ºC for 1 minute per kb of PCR product
- Add the following components to a DNase/RNase-free microcentrifuge tube. The 25-μl reaction size may be scaled up or down as needed.
Component Volume Final Concentration AccuPrime™ SuperMix II 12.5 μl 1X Primer mix (10 μM each) 0.5 μl 0.2 μM each Template DNA (10 pg–200 ng) ≥ 1 μl as required Autoclaved distilled water to 25 μl n/a
- Cap the tube, tap gently to mix, and centrifuge briefly to collect the contents.
- Place the tube in the thermal cycler and run the program from Step 1.
- After cycling, maintain the reaction at 4°C. Samples can be stored at –20°C until use.
Analyze the amplification products by agarose gel electrophoresis. We recommend using E-Gel® 1.2% gels and TrackIt™ 100 bp or 1kb Plus DNA ladders.
|E-Gel® 1.2% Starter Pak||6 gels plus PowerBase™||G6000-01|
|TrackIt™ 100 bp DNA Ladder||100 applications||10488-058|
|TrackIt™ 1kb Plus DNA Ladder||100 applications||10488-085|
- Chou, Q., Russell, M., Birch, D., Raymond, J., and Bloch, W. (1992) Prevention of pre-PCR mis-priming and primer dimerization improves low-copy-number amplifications. Nucl. Acids Res., 20, 1717-1723
- Innis, M. A., Gelfand, D. H., Sninsky, J. J., and White, T. S. (eds) (1990) PCR Protocols: A Guide to Methods and Applications, Academic Press, San Diego, CA
- Sharkey, D. J., Scalice, E. R., Christy, K. G., Atwood, S. M., and Daiss, J. L. (1994) Antibodies as thermolabile switches: high temperature triggering for the polymerase chain reaction. Biotechnology, 12, 506-509