Description
![[Duck photo] Learn more about the Q5® DNA Polymerase family of products](https://media.neb.com/asset/eebadfa7-45f3-419d-9c75-5c05a26bb921/Webp_JPG_PSD/Q5_LearnMore_Banner.webp?=)
The Q5 Quick-Load High-Fidelity 2X Master Mix offers high-fidelity performance in a convenient master mix format. The master mix features Q5, a high-fidelity, thermostable DNA polymerase with 3´to 5´ exonuclease activity fused to a processivity-enhancing Sso7d domain. With an error rate ~280-fold lower than that of Taq DNA Polymerase, Q5 offers highly accurate amplification and can be used to amplify difficult or long targets (up to 20 kb for simple templates). The master mix includes polymerase, dNTPs, Mg++, and two commonly used tracking dyes for easy and direct loading of PCR products onto gels. On a 1% agarose gel in 1X TBE, Xylene Cyanol FF migrates at ~3-5 kb and Tartrazine migrates at ~50 bp. The broad-use buffer requires only the addition of primers and DNA template for robust amplification, regardless of GC content.
To determine the optimal annealing temperature for a given set of primers, use of the NEB Tm Calculator is highly recommended.
Figure 1: Q5 formats support robust amplification of a broad range of targets

For flexibility, standalone Q5 polymerase products and the included High GC Enhancer can support amplification of targets with differing amounts of GC content. For convenience, and to amplify a broad range of target GC content, Q5 master mixes are recommended.
Figure 2: Migration of tracking dyes contained in Quick-Load® PCR reagents during electrophoresis

Quick-Load PCR reagents enable direct loading of PCR products onto agarose DNA gels for analysis. Quick-Load amplification products deliver the same performance as their non-Quick-Load equivalents, while incorporating two PCR-inert tracking dyes for enhanced visualization. During gel electrophoresis, the blue Xylene Cyanol FF dye co-migrates with DNA fragments of approximately 3-5 kb in a 1% agarose gel, while the yellow Tartrazine dye migrates at approximately 50 bp for clear monitoring of both large and small DNA fragments. Additionally, the combination of the blue and yellow dyes results in a green reagent that enables visual tracking of reaction set up.
Figure 3: Q5 Quick-Load™ products can amplify long targets with high specificity and a simpler setup

Triplicate PCR reactions were performed using two 5 kb human targets with 10 ng of human genomic DNA, utilizing Q5® High-Fidelity 2X Master Mix and Q5 Quick-Load High-Fidelity 2X Master Mix according to the manufacturer's recommended protocols. Both Q5 Quick-Load High-Fidelity 2X Master Mix and Q5 High-Fidelity 2X Master Mix demonstrated robust and highly specific amplification of long amplicons. L = Quick-Load® Purple 1 kb DNA Ladder (NEB #N0552).
Figure 4: Q5 Quick-Load™ products exhibit equally high performance as Q5® products when amplifying AT-rich targets

Triplicate PCR reactions were performed using 4 human targets with a high AT content. The amplification was performed with 10 ng of human genomic DNA, utilizing Q5 High-Fidelity 2X Master Mix and Q5 Quick-Load High-Fidelity 2X Master Mix according to the manufacturer's recommended protocols. Both Q5 High-Fidelity 2X Master Mix and Q5 Quick-Load High-Fidelity 2X Master Mix consistently demonstrated robust and highly specific amplification of AT-rich amplicons. L = Quick-Load® Purple 1 kb DNA Ladder (NEB #N0552).
Figure 5: Equally high performance on a broad range of amplicons with a convenient setup

Triplicate PCR reactions were performed using 4 human targets with average length and GC content. The amplification was performed with 10 ng of human genomic DNA, utilizing Q5® High-Fidelity 2X Master Mix and Q5 Quick-Load™ High-Fidelity 2X Master Mix according to the manufacturer's recommended protocols. Both Q5 High-Fidelity 2X Master Mix and Q5 Quick-Load High-Fidelity 2X Master Mix consistently demonstrated robust and highly specific amplification across a range of GC content. L = Quick-Load® Purple 1 kb DNA Ladder (NEB #N0552).
![[Icon] Use our Tm Calculator to determine your primers' optimal annealing temperature.](https://media.neb.com/asset/46e6c17d-deda-4972-a20c-2c3463d03d8b/Webp_JPG_PSD/TmCalculator_Banner.webp?=)
- This product is related to the following categories:
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Q5® High-Fidelity DNA Polymerases,
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Master Mixes,
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PCR, qPCR & Amplification Technologies,
- This product can be used in the following applications:
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High-Fidelity PCR,
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DNA Amplification, PCR & qPCR,
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PCR