Thermo Scientific™

Phusion™ Hot Start II DNA Polymerase & dNTP Mix (10 mM each)

Catalog number: F549N
Thermo Scientific™

Phusion™ Hot Start II DNA Polymerase & dNTP Mix (10 mM each)

Catalog number: F549N
Catalog Number
Unit Size
2000 reactions
Price (USD)
Price: 2,635.00
Your Price:
Catalog NumberUnit SizePrice (USD)AvailabilityQuantity
F549N2000 reactions
Price: 2,635.00
Your Price:
Product Overview
Citations & References
Additional Information
This package includes Phusion Hot Start II High-Fidelity DNA Polymerase (4 x 500 U) and high quality dNTP Mix (10 mM each, 2 x 1 mL).

Phusion Hot Start II High-Fidelity DNA Polymerase
Thermo Scientific Phusion High-Fidelity DNA polymerases set a high standard for high performance PCR. Featuring an error rate 52-fold lower than that of Taq, and 6-fold lower than that of Pfu, they are an excellent choice for cloning and other applications requiring high fidelity. They offer robust performance with short protocol times, even in the presence of PCR inhibitors, and generate higher yields with lower enzyme amounts than other DNA polymerases.

• High fidelity (52X Taq)
• No non-specific amplification and primer degradation during reaction setup
• Fast PCR due to short extension times (15-30 s/kb)
• Increased product yields with minimal enzyme amounts

When using Phusion Hot Start II High-Fidelity DNA Polymerase, amplification proceeds without the production of nonspecific products due to the combination of Phusion DNA Polymerase and a reversibly bound, specific Affibody ligand that inhibits DNA polymerase activity at room temperature. The Affibody ligand also inhibits the 3´→5´ exonuclease activity of the polymerase, thus preventing degradation of primers and template DNA during reaction setup. At temperatures that promote polymerase activity, the ligand is released, rendering the polymerase fully active. Phusion Hot Start II High-Fidelity DNA Polymerase is immediately reactivated at high temperatures, so does not require a separate activation step in PCR protocols.

Using Phusion DNA polymerases
Annealing rules for Phusion DNA polymerases are different from many common DNA polymerases (such as Taq DNA polymerases). For optimal results, use our Tm calculator at

Learn more about all Phusion DNA polymerases ›

dNTP Mix
Thermo Scientific dNTP Mix contains pre-mixed aqueous solutions of dATP, dCTP, dGTP, and dTTP, each at a final concentration of 10 mM. The nucleotides have greater than 99% purity and are free of nuclease activities, as well as human and E. coli DNA. Mixes offer the possibility of reducing the number of pipetting steps and the risk of reaction setup errors.

• Greater than 99% purity confirmed by HPLC
• Free of human and E. coli DNA
• Stable after multiple freeze-thaw cycles
• Up to 95% of dNTPs remain in triphosphate form after 7 weeks at room temperature
• Up to 90% of dNTPs remain in triphosphate form after 30 cycles of PCR (1 minute at 94°C; 3 minutes at 72°C)

For use in all molecular biology applications, including PCR, real-time PCR, high fidelity and long PCR, LAMP-PCR, cDNA synthesis, RT-PCR, RDA, MDA, DNA labeling, and DNA sequencing.

Learn more about all dNTPs formats ›

For Research Use Only. Not for use in diagnostic procedures.


Detection Method
GC-Rich PCR Performance
Phusion Hot Start II DNA Polymerase
Reaction Speed
Product Line
Product Type
Hot Start DNA Polymerase and dNTP Mix
Purity or Quality Grade
Shipping Condition
Dry Ice
Sufficient For
2000 Reactions
2 U/µL
Fidelity (vs. Taq)
52 X
Hot Start
Built-In Hot Start
No. of Reactions
2000 Reactions
Reaction Format
Separate Components
Size (Final Product)
20 kb or Less
Starting Material

Contents & Storage

• Phusion Hot Start II High-Fidelity DNA Polymerase (2 U/µL)
• 5X Phusion HF Buffer
• 5X Phusion GC Buffer
• 50 mM MgCl2 solution
• 10 mM dNTP Mix

Store at -5 to -30°C.


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    Frequently asked questions (FAQs)

    Citations & References

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