HomePolymerase Chain Reaction ApplicationsExtract-N-Amp™ Blood PCR Kit Protocol

Extract-N-Amp™ Blood PCR Kit Protocol

Catalog Numbers: XNAB2, XNAB2E, XNAB2RXNAB2RE, and P8115

Product Description
Reagents and Equipment Required But Not Provided
Precautions and Disclaimer
PCR amplification
Troubleshooting Guide

Product Description

The Extract-N-Amp™ Blood PCR Kits contain all the reagents needed to rapidly extract and amplify human genomic DNA from whole blood, whole blood dried on a blood card, and cultured mammalian cells. Briefly, DNA is released by incubating the sample with the Lysis Solution at room temperature for 5 minutes for whole blood, at 55 °C for 15 minutes for blood cards, or at 75 °C for 5-10 minutes for cell monolayers. After adding the Neutralization Solution, the extract is ready for PCR.

To amplify the target DNA, the neutralized extract is combined with the Extract-N-Amp™ Blood PCR ReadyMix™ reagent and PCR primers. The Extract-N-Amp™ Blood PCR ReadyMix™ reagent is a 2X reaction mixture containing buffer, salts, dNTPs, and Taq polymerase. It also contains the JumpStart™ antibody for hot-start PCR to enhance specificity. Note that the Extract-N-Amp™ Blood PCR ReadyMix™ reagent has the same formulation as the REDExtract-N-Amp™ Blood PCR ReadyMix™ reagent, except that the red dye is omitted, which enables detection methods where the dye interferes.

Reagents and equipment required, not provided

  • Microcentrifuge tubes or multiwell plate for extractions (200 µL minimal volume)
  • Punch and cards for dried blood
  • Incubator or oven for blood cards (55 °C) or monolayer cells (75 °C)
  • Tubes or plate for PCR
  • Thermal cycler
  • PCR primers
  • Water, PCR reagent, Product No. W1754


Store the Extract-N-Amp™ Blood PCR Kits at 2-8 °C for up to 3 weeks. For storage greater than 3 weeks, store at -20 °C. Do not store in a frost-free freezer.

Precautions and Disclaimer

The Extract-N-Amp™ Blood PCR Kits are for R&D use only, not for drug, household or other uses. The Lysis Solution is caustic. Avoid contact with skin. Wear gloves, safety glasses, and suitable protective clothing when handling this or any other reagent provided with the kit. Consult the MSDS for information regarding hazards and safe handing practices.


All steps are carried out at room temperature unless otherwise noted.

A. DNA extraction from Whole Blood

1a.   Collect blood into tubes containing EDTA, sodium citrate, or sodium heparin. The best results may be obtained
        with EDTA or sodium citrate. Mix thoroughly by inversion or rocking.
      Note: For non-human sources, collect blood into tripotassium EDTA (E0270), at a final
        concentration  of 5 mM to prevent coagulation.

2a.   Place 20 µL of the Lysis Solution for Blood into a microcentrifuge tube or well of a multiwell plate for each

3a.   Add 10 µL of blood. Mix thoroughly by vortexing or pipetting.

4a.   Incubate at room temperature for 5 minutes.

5a.   Add 180 µL of the Neutralization Solution for Blood. Mix thoroughly by vortexing or pipetting.

6a.   Store the neutralized blood extract at 4 °C or use 2 µL immediately in PCR. Continue with step 7.
        Note: DNA is stable in the extract for at least 6 months at 4 °C.

B. DNA extraction from Blood Cards

1b.   Collect the blood sample onto a collection card, Product No. C2613. Allow to dry completely.

2b.   Punch a disk (preferably 1/8 inch or 3 mm) from the blood card and place into a microcentrifuge tube.
        Make sure that the punch contains as much of the blood-stained area as possible.

3b.   Pipette 20 µL of the Lysis Solution for Blood onto the blood card punch. Samples can be spun in a
        microcentrifuge  for a few seconds to force the solution into the punch.

4b.   Incubate at 55 °C for 15 minutes.

5b.   Add 180 µL of the Neutralization Solution for Blood. Mix thoroughly by vortexing or pipetting.

6b    Store the neutralized blood extract at 4°C or use 2 µL immediately in PCR. Continue with step 7.
        Note: DNA is stable in the extract for at least 6 months at 4 °C.

C. DNA Extraction from Cultured Mammalian Cells

1c.    Grow monolayer cells in a multiwell plate until 90 to 95% confluent.

2c.    Aspirate the medium from the wells using a pipette tip connected to the vacuum system. The medium must be
         removed completely.

3c.    Add 20 µL of the Lysis Solution for Blood to the wells.
         Note: It is preferred at this point to seal the plate with AlumaSeal™ II (A2350), to prevent
         loss by evaporation during incubation in step 4c. The Alumaseal™ can be pierced with a pipette tip to add
         the Neutralization Solution for Blood in step 5c. A new layer of AlumaSeal™ can be placed over the original
         layer to reseal the plate for storage.

4c.    Incubate the plate at 75 °C for 5 to 10 minutes (for a 24 well plate, 5 minutes is recommended to avoid
         overdrying the samples).

5c.    Add 180 µL of the Neutralization Solution for Blood to each of the wells. Mix the samples by pipetting up and

6c.    Store the neutralized cell extract at 4 °C or use 2 µL immediately in PCR. Continue with step 7.
         Note: DNA is stable in the extract for at least 6 months at 4 °C.

PCR amplification

The Extract-N-Amp™ Blood PCR ReadyMix reagent contains the JumpStart™ antibody for specific hot start amplification. Therefore, PCR reactions can be assembled at room temperature without premature Taq DNA polymerase activity.

Typical final primer concentrations are approximately 0.4 µM each. The optimal primer concentration and cycling parameters will depend on the system used.

7.    Add the following reagents to a thin-walled PCR microcentrifuge tube or plate:

Note:Note: The neutralized blood extract may inhibit PCR amplification of products larger than 2 kb. Neutralization Solution B, Product No. N3910, can be used overcome this inhibition and allows successful amplification of longer PCR products. Add 1 µL of Neutralization Solution B to each reaction. Neutralization Solution B is not part of this kit and must be purchased separately.

8.    Mix gently.

9.    For thermal cyclers without a heated lid, add 20 µL of mineral oil on top of the mixture in each tube to prevent evaporation.

10.  Perform thermal cycling. The amplification parameters should be optimized for individual primers, template, and
       thermal cycler (see References for guidance).

Common cycling parameters:

11.    The amplified DNA can be loaded onto an agarose gel after the PCR is completed with the addition of a separate
         loading buffer/tracking dye such as Gel Loading Solution (G2526).
         Note: PCR products can be purified, if desired, for applications such as sequencing with the GenElute™ PCR
         Clean-Up Kit (NA1020).

AlumaSeal is a trademark of Excel Scientific, Inc.
Extract-N-Amp, GenElute, JumpStart, ReadyMix and REDExtract-NAmp are trademarks of Merck KGaA, Darmstadt, Germany or its affiliates. All other trademarks are the property of their respective owners. Detailed information on trademarks is available via publicly accessible resources.



Dieffenbach, C.W., and Dveksler, G.S. (Eds.), PCR Primer: A Laboratory Manual, Cold Spring Harbor Laboratory Press, New York (1995).

Don, R.H., et al., ‘Touchdown' PCR to circumvent spurious priming during gene amplification. Nucleic Acids Res., 19, 4008 (1991).

Erlich, H.A. (Ed.), PCR Technology: Principles and Applications for DNA Amplification, Stockton Press, New York (1989).

Griffin, H.G., and Griffin, A.M. (Eds.), PCR Technology: Current Innovations, CRC Press, Boca Raton, FL (1994).

Innis, M.A., et al., (Eds.), PCR Strategies, Academic Press, New York (1995).

Innis, M., et al., (Eds.), PCR Protocols: A Guide to Methods and Applications, Academic Press, San Diego, California (1990).

McPherson, M.J., et al., (Eds.), PCR 2: A Practical Approach, IRL Press, New York (1995).

Newton, C.R. (Ed.), PCR: Essential Data, John Wiley & Sons, New York (1995).

Roux, K.H. Optimization and troubleshooting in PCR. PCR Methods Appl., 4, 5185-5194 (1995).

Saiki, R. PCR Technology: Principles and Applications for DNA Amplification, Stockton, New York (1989).


Use of this product is covered by one or more of the following US patents and corresponding patent claims outside the US: 5,789,224 and 5,618,711. The purchase of this product includes a limited, non-transferable immunity from suit under the foregoing patent claims for using only this amount of product for the purchaser’s own internal research. No right under any other patent claim, no right to perform any patented method, and no right to perform commercial services of any kind, including without limitation reporting the results of purchaser's activities for a fee or other commercial consideration, is conveyed expressly, by implication, or by estoppel. This product is for research use only. Diagnostic uses under Roche patents require a separate license from Roche. Further information on purchasing licenses may be obtained by contacting the Director of Licensing, Applied Biosystems, 850 Lincoln Centre Drive, Foster City, California 94404, USA.

JumpStart and JumpStart Antibody are licensed under U.S. Patent No. 5,338,671 and 5,587,287 and corresponding patents in other countries

JC,RC,PHC 01/13-1

Sign In To Continue

To continue reading please sign in or create an account.

Don't Have An Account?