Product Class: Other

LongAmp® Hot Start Taq DNA Polymerase

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Product Introduction

LongAmp® Hot Start Taq DNA Polymerase offers exceptional performance with long amplicons.

  • Aptamer-based inhibitor enables room temperature reaction setup
  • Optimized enzyme blend for amplification up to 30 kb
  • 2X higher fidelity than Taq
  • Master mix version available
Catalog # Size Concentration
M0534L 2,500 units 2,500 units/ml
M0534S 500 units 2,500 units/ml

Product Information


LongAmp Hot Start Taq DNA Polymerase is a unique blend of aptamer-based Hot Start Taq and Deep VentR™ DNA Polymerases. The aptamer-based inhibitor binds reversibly to the enzyme, inhibiting polymerase activity at temperatures below 45°C, but releases the enzyme during normal PCR cycling conditions. This permits assembly of PCR reactions at room temperature. An advantage of the aptamer-based hot start mechanism is that it does not require a separate high temperature incubation step to activate the enzyme. The 3´→5´ exonuclease activity of Deep VentR DNA Polymerase increases the fidelity and robust amplification of Hot Start Taq DNA Polymerase (1). LongAmp Hot Start Taq DNA Polymerase offers two-fold higher fidelity than Hot Start Taq DNA Polymerase alone. A wide range of PCR products can be generated; up to 30 kb from lambda or human genomic DNA.

Amplification of a 6 kb amplicon from varying amounts of human genomic DNA using LongAmp Hot Start Taq DNA Polymerase. Starting template amounts are indicated below the gel. Marker M is the NEB 2-Log DNA Ladder (NEB #N3200)

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.

Reagents Supplied

The following reagents are supplied with this product:

Store at (°C) Concentration
LongAmp® Taq Reaction Buffer Pack -20 5 X
Product Categories:
LongAmp® DNA Polymerases
Hot Start PCR,
Long Range PCR,
Specialty PCR
Routine PCR

Advantages and Features



Application Features


Properties and Usage

Unit Definition

One unit is defined as the amount of enzyme that will incorporate 10 nmol of dNTP into acid insoluble material in 30 minutes at 75°C.

Reaction Conditions

1X LongAmp™ Taq Reaction Buffer

Storage Temperature


Storage Conditions

10 mM Tris-HCl
100 mM KCl
1 mM DTT
0.1 mM EDTA
0.5% Tween® 20
0.5% IGEPAL® CA-630
50% Glycerol
pH 7.4 @ 25°C

Heat Inactivation


5' - 3' Exonuclease


3' - 5' Exonuclease


Strand Displacement


Unit Assay Conditions

1X ThermoPol® Reaction Buffer, 200 µM dNTPs including [3H]-dTTP and 15 nM primed M13 DNA.

Error Rate

<= 0x100bases


  1. 5'→3' flap endonuclease destroys displaced strand.


  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.

Faqs & Tech Tips


  1. What is the recommended enzyme amount when using LongAmp™ Hot Start Taq DNA Polymerase?
  2. What is the fidelity of the LongAmp™ Hot Start Taq DNA Polymerase compared to Taq DNA Polymerase?
  3. Can the extension step be carried out at 72°C when using LongAmp™ Hot Start Taq DNA Polymerase?
  4. What type of DNA ends result from a primer extension reaction or a PCR using LongAmp™ Hot Start Taq DNA Polymerase?
  5. What is the extension rate when using LongAmp™ Hot Start Taq DNA Polymerase?
  6. Why is the product a smear when visualized on an agarose gel?
  7. Can LongAmp™ Hot Start Taq DNA Polymerase be used to amplify GC-rich amplicons?

Tech Tips

Using an extension temperature of 65°C is recommended in LongAmp Taq reactions

Protocols & Manuals


  1. PCR Protocol for LongAmp® Hot Start Taq DNA Polymerase (M0534)


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 or fill out the Technical Support Form for appropriate document.)

Other Tools & Resources

Selection Charts

Usage Guildelines & Tips

Troubleshooting Guides

PCR Troubleshooting Guide Taq PCR Kit Troubleshooting Guide

Interactive Tools

Quality & Safety

Quality Assurance Statement

Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.


The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]

Certificate Of Analysis

The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality control's for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]

Safety DataSheets

The following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.