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  • OneTaq® Quick-Load® 2X Master Mix with Standard Buffer


    OneTaq® Quick-Load® 2X Master Mix with Standard Buffer is an optimized, ready-to-use blend of Taq and Deep VentR ™ DNA Polymerases ideally suited to routine PCR applications from a variety of templates, including pure DNA solutions, bacterial colonies and cDNA products. The 3´→5´ exonuclease activity of Deep Vent DNA Polymerase increases the fidelity and robust amplification of Taq DNA Polymerase (1). The convenient quick-load master mix formulation contains dNTPs, MgCl2, buffer components and stabilizers as well as two commonly used tracking dyes for DNA gels. On a 1% agarose gel in 1X TBE, Xylene Cyanol FF migrates at ~4 kb and Tartrazine migrates at ~10 bp. Both dyes are present in concentrations that do not mask comigrating DNA bands.

    Amplification of a selection of sequences with varying GC content from human and C. elegans genomic DNA using OneTaq DNA Polymerase. Amplicon sizes are indicated next to gel, and GC content is indicated above gel. Marker M is the 1 kb DNA Ladder (NEB #N3232 ).

    Product Source

    An E. coli strain that carries the Taq DNA Polymerase gene from Thermus aquaticus YT-1 and an E. coli strain that carries the Deep VentR DNA Polymerase gene from Pyrococcus species GB-D.

    Advantages and Features


    • High Sensitivity PCR
    • High Throughput PCR
    • Routine PCR
    • AT-rich PCR
    • Colony PCR
    • Long PCR (up to ~6 kb genomic)

    Properties and Usage

    Storage Temperature


    Buffer Composition

    20 mM Tris-HCl
    22 mM KCl
    22 mM NH4Cl
    1.8 mM MgCl2
    5% Glycerol
    0.06% IGEPAL® CA-630
    0.05% Tween® 20
    0.2 mM dNTPs
    1X Xylene Cyanol
    1X Tartrazine
    25 units/ml OneTaq® DNA Polymerase
    pH 8.9@25°C

    Heat Inactivation


    Unit Assay Conditions

    1X ThermoPol® Reaction Buffer, 200 μM dNTPs including [3H]-dTTP and 200 μg/ml activated Calf Thymus DNA.

    Quality Control

    Quality Control Assays

    The following Quality Control Tests are performed on each new lot and meet the specifications designated for the product. Individual lot data can be found on the Product Summary Sheet/Datacard or Manual which can be found in the Supporting Documents section of this page.
    • PCR Amplification (Master Mix):
      The polymerase master mix is tested in a polymerase chain reaction (PCR) using a control template and specific primers, resulting in the expected product.


    1. Product specifications for individual components in the OneTaq Quick-Load 2X Master Mix with Standard Buffer are available separately.
    2. OneTaq Quick-Load 2X Master Mix with Standard Buffer is stable for fifteen freeze-thaw cycles when stored at -20°C.
    3. OneTaq Quick-Load 2X Master Mix with Standard Buffer is also stable for one month at 4°C, so for frequent use, an aliquot may be kept at 4°C.


    1. Barnes, W.M. (1994). Proc. Natl. Acad. Sci. USA. 91, 2216-2220.
    2. Saiki R.K. et al. (1985). Science. 230, 1350-1354.
    3. Powell, L.M. et al. (1987). Cell. 50, 831-840.
    4. Sun, Y., Hegamyer, G. and Colburn, N. (1993). Biotechniques. 15, 372-374.
    5. Sarkar, G., Kapelner, S. and Sommer, S.S. (1990). Nucleic Acids Res.. 18, 7465.

    Supporting Documents

    Material Safety Datasheets

    The following is a list of Material Safety Data Sheets (MSDS) that apply to this product to help you use it safely. The following file naming structure is used to name these document files: [Product Name] MSDS. For international versions please contact us at info@neb.com.


    The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The following file naming structure is used to name the majority of these document files: [Catalog Number]Datasheet-Lot[Lot Number]. For those product lots not listed below, please contact NEB at info@neb.com or fill out the Technical Support Form for appropriate document.
    1. How should I set up a PCR using the OneTaq® Quick-Load® Master Mixes?
    2. Can I use my regular Taq-based cycling conditions for OneTaq® DNA Polymerase based products?
    3. Can I use OneTaq® DNA Polymerase in "hot start" PCR to help with specificity or primer dimer problems?
    4. What are the stability and storage requirements of the Quick-Load® OneTaq® Master Mixes?
    5. Can OneTaq® DNA Polymerase be used in colony PCR?
    6. What type of DNA ends result from a primer extension reaction or a PCR using OneTaq® DNA Polymerase?
    7. How long a product can be made by OneTaq® DNA Polymerase?
    8. Can OneTaq® DNA Polymerase be used with uracil-containing primers or bisulfite-treated DNA?
    9. What is the fidelity of OneTaq® DNA Polymerase?
    10. Where can I find help troubleshooting my PCR?
    11. How should I determine an appropriate annealing temperature for my reaction?
    12. How is OneTaq DNA Polymerase different from LongAmp™ Taq DNA Polymerase?
    1. Protocol for OneTaq® Quick-Load 2X Master Mix with Standard Buffer (M0486)

    Selection Tools

    Usage Guidelines & Tips

    Troubleshooting Guides

    Interactive Tools

    Application Notes

    A master mix with a gel loading dye is the ultimate time-saver! It allows for easy reaction set up and with the gel loading dye already in the mix, the results of your PCR are available even faster.