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An optimized blend of Taq and Deep VentR® DNA polymerases, OneTaq® and OneTaq® Hot Start
DNA Polymerases offer robust amplification across a wide range of templates. The 3´–5´ exonuclease
activity of Deep Vent DNA Polymerase increases the fidelity and robustness of Taq,
and the hot start formulation combines convenience with decreased interference from primerdimers
and secondary products. Additionally, OneTaq Reaction Buffers and High GC Enhancer
have been formulated for robust yields with minimal optimization, regardless of a template's
GC content. Both polymerases are available in master mix and Quick-Load® master mix formats.
In contrast to chemically modified or antibody-based hot start polymerases, NEB's OneTaq Hot
Start utilizes aptamer technology. This unique modified oligonucelotide binds to the polymerase
through non-covalent interactions, blocking polymerase activity at temperatures below 45°C.
The polymerase is activated during normal cycling conditions, allowing reactions to be set up at
room temperature.
Advantages:
- Exceptional performance in endpoint PCR across a wide range of template
- Robust yields with minimal optimization
- Convenient product formats (stand-alone enzyme, master mixes, and Quick-Load® formats)
- Hot start version allows room temperature reaction setup and does not require a separate activation step
- Compatible with standard Taq protocols
Applications:
- High sensitivity PCR
- High throughput PCR
- Routine PCR
- GC-rich PCR
- AT-rich PCR
- Primer extension
- Colony PCR
- Long PCR (up to ~6 kb genomic)
Achieve robust amplification for routine, AT- and GC-rich
templates with OneTaq

Amplification of a selection of sequences with varying AT and GC
content from human and C. elegans genomic DNA using OneTaq
DNA Polymerase. GC content is indicated above gel. Marker M is
the 1 kb DNA Ladder.
Comparison of OneTaq DNA Polymerase to other commercially available
polymerases (non-hot start).

Amplification of a selection of high GC human genomic DNA templates
demonstrates OneTaq performance. PCR experiments included 30 amplification
cycles. Purity (A) and Yield (B) were calculated via microfluidic analysis from
triplicate reactions. Competitor polymerases were cycled according to
manufacturer's recommendations.
OneTaq Buffer Recommendations
AMPLICON %
GC CONTENT |
RECOMMENDED
DEFAULT BUFFER |
OPTIMIZATION NOTES |
| <50% GC |
OneTaq Standard Reaction Buffer* |
Adjust annealing temperature, primer/
template concentration, etc., if needed. |
| 50–65% GC |
OneTaq Standard Reaction Buffer* |
OneTaq GC Reaction Buffer can be
used to enhance performance of difficult
amplicons. |
| >65% GC |
OneTaq GC Reaction Buffer* |
OneTaq GC Reaction Buffer with
10–20% OneTaq High GC Enhancer
can be used to enhance performance of
difficult amplicons. |
* Mg-free formulations are also available.
OneTaq Hot Start DNA Polymerase

Amplification of a selection of sequences with varying GC content from human
and C. elegans genomic DNA using OneTaq Hot Start DNA Polymerase. The
presence or absence of an extended room temperature incubation does not
affect performance. GC content is indicated above gel. Marker M is the 1 kb
DNA Ladder.
OneTaq 2X Master Mix with Standard Buffer

Amplification of a selection of sequences with varying GC content from
human and C. elegans genomic DNA using OneTaq 2X Master Mix with
Standard Buffer. Amplicon sizes are indicated next to gel, and GC
content is indicated above gel. Marker M is the 1 kb DNA Ladder. |
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OneTaq 2X Master Mix with GC Buffer
 Amplification of a selection of sequences with varying GC content from human genomic DNA using OneTaq 2X Master Mix with GC Buffer. GC content is indicated above gel. Marker M is the 1 kb DNA Ladder. |
Comparison of OneTaq Hot Start DNA Polymerases to other commercially available hot start polymerases.

Reactions containing high GC human genomic DNA templates were set up at room temperature. PCR experiments included 30 cycles.
Purity (A) and Yield (B) were calculated via microfluidic analysis from triplicate reactions. OneTaq polymerases were used with GC
Buffer. Some OneTaq reactions also contained High GC Enhancer (striped bars). Competitor polymerases were cycled according to
manufacturer's recommendations and included GC enhancers when supplied (striped bars).
Table 1: Recommended time for enzyme activation of commercially available Hot Start Taq products
| MANUFACTURER |
ENZYME |
ACTIVATION STEP* |
HOT START FORM |
| Applied BioSystems |
AmpliTaq Gold® 360 |
10', 95°C |
Modified |
| Invitrogen |
Platinum® Taq |
30"–2', 94°C |
Ab |
| Promega |
GoTaq® Hot Start |
2', 94–95°C |
Ab |
| Qiagen |
HotStarTaq |
15', 95°C |
Modified |
| Roche |
FastStart Taq |
4', 95°C |
Modified |
| Sigma |
JumpStart™ Taq |
1', 94°C |
Ab |
| Thermo Fisher |
Thermo-Start Taq |
15', 95°C |
Modified |
| NEB |
OneTaq |
None |
Aptamer |
* May include initial denaturation step.
Ordering Information
AmpliTaq Gold® is a registered trademark of Life Technologies.
Platinum® is a registered trademark of Invitrogen.
GoTaq® is a registered trademark of Promega.
JumpStart™ is a trademark of Sigma.
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