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11811002001 Roche

Expand 20 kbPLUS PCR System



Related Categories Biochemicals and Reagents, Fluorescent Enzyme Substrates, Fluorescent Enzyme Substrates for Immunoassays, Fluorescent Probes, Labels, Particles and Stains
Quality Level   100
usage   sufficient for ≤40 reactions
packaging   pkg of 200 U
mfr. no.   Roche
parameter   68 °C optimum reaction temp.
shipped in   dry ice
storage temp.   −20°C


General description

This PCR system is an improvement of the Barnes Technology and shows good performance for the amplification of fragments longer than 20 kb.
The Expand 20 kbPLUS PCR System is composed of a special enzyme mix containing thermostable Taq DNA polymerase and Tgo DNA polymerase, a thermostable DNA polymerase with proofreading activity. This powerful polymerase mixture and associated buffer system is designed to give a high yield of PCR product when fragments longer than 20 kb need to be amplified.
T/A cloning can be used for fragments produced by this kit.
To obtain long PCR products, first evaluate length and purity of the DNA template. Handling all genomic DNA templates with care. Genomic DNA template should be larger than 50 kb, as determined with agarose gel electrophoresis.

The Expand 20 kbPLUS PCR System contains human control DNA and human control ß-globin primers which allow the amplification of a 23 kb fragment.
These reagents may serve as a control reaction but can also be used to test the quality of human template DNA ´s and/or the respective primer pairs.

T/A cloning can be applied.
For a standard 50 μl PCR, we recommend using 5 U of the enzyme blend.

• Expand 20 kbPLUS Enzyme Mix
• Expand 20 kbPLUS Reaction Buffer, 10x concentrated with 27.5 mM MgCl2
• MgCl2 Solution, 25 mM
• Human Genomic DNA
• Human β-globin Control Primer, forward (HβG forward)
• Human β-globin Control Primer, reverse (HβG reverse)

Other Notes

For life science research only. Not for use in diagnostic procedures.


Use the Expand 20 kbPLUS PCR System to amplify genomic DNA fragments up to 35 kb. The Expand 20 kbPLUS PCR System features a specifically optimized buffer and enzyme-blend mixture to amplify extra-long pieces of DNA (over 20 kb). Control primers and DNA produce fragments of 23 kb in length.
• Large-fragment amplification

Use the Expand 20 kbPLUS PCR System, dNTPack with ready-to-use PCR Nucleotide Mix.

Features and Benefits

• Go the limit.
The buffer and enzyme-blend amplify products over 20 kb DNA.
• Easy PCR monitoring.
Human genomic DNA and human control ß-globin primers amplify a 23 kb fragment.
• Test template quality.
Control reagents also test template quality and primer pair performance.


1 kit containing 6 components


Each lot of Expand 20 kbPLUS PCR System is function-tested in PCR using human genomic DNA and specific primers for β-globin to amplify a 23 kb fragment.

Unit Definition

Volume Activity: 5 U/μl

Legal Information

Use of this product is covered by US Patent No. 6,127,155 and corresponding patent claims outside the US.  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 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. Human and veterinary diagnostic uses under Roche patent claims require a separate license from Roche.  All uses other than internal research and human and veterinary diagnostic uses under Roche patent claims require a separate license from Thermo Fisher Scientific. Further information on purchasing licenses from Roche may be obtained by contacting the Licensing Department of Roche Molecular Systems, Inc., 4300 Hacienda Drive, Pleasanton, California 94588, USA or Roche Diagnostics GmbH, Sandhofer Strasse 116, 68305 Mannheim, Germany.  Further information on purchasing licenses from Thermo Fisher Scientific may be obtained by contacting the Licensing Department of  Thermo Fisher Scientific, 5791 Van Allen Way, Carlsbad, California 92008, USA.

Expand is a trademark of Roche

Kit component only


Product #

Add to Cart

Expand 20 kbPLUS Enzyme Mix    
Expand 20 kbPLUS Reaction Buffer, with 27.5 mM MgCl2 10x concentrated    
MgCl2 Stock Solution 25 mM    
Human Genomic DNA    
Human β-globin Control Primer forward, (HβG forward)    
Human β-globin Control Primer reverse, (HβG reverse)    
Safety & Documentation

Safety Information

Hazard statements 
Precautionary statements 
NONH for all modes of transport
Flash Point(F) 
does not flash
Flash Point(C) 
does not flash
Protocols & Articles


Roche PCR Reagents and PCR Protocols

For additional information on Hot Start PCR technology, protocols, and to download our free Hot Start PCR eBook, please visit our Hot Start PCR resource guide.
Keywords: Amplification, Cloning, Gas chromatography, Gene expression, Polymerase chain reaction, Polymerase chain reaction - quantitative, Purification, Sequencing, Transcription

Peer-Reviewed Papers


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