Enzyme-Assisted PCR Carryover Control
Application Solution
Overview
Combine UDG treatment with a compatible dUTP-based PCR workflow to reduce carryover from earlier amplifications.
How can false positives caused by residual PCR amplicons be reduced?
Challenges
- Aerosols containing amplicons can contaminate the laboratory
- Residual templates may be amplified again in subsequent reactions
- Complex samples require both amplification stability and sensitivity
Recommended Approach
1. Introduce dUTP labeling
Use dUTP in a compatible PCR system so that the resulting amplicons become recognizable substrates for UDG.
2. Treat with UDG before amplification
Use uracil-DNA glycosylase to treat residual amplicons from earlier reactions and reduce their ability to serve as templates.
3. Match the amplification system
Choose a suitable Taq DNA polymerase and reaction parameters according to sample type and detection target.
Potential Benefits
- Reduced carryover-contamination risk
- More reliable detection results
- Applicable to PCR and related molecular-detection workflows
Related Products
Uracil-DNA Glycosylase (UDG)
Recognizes and removes uracil from DNA. In compatible dUTP-based PCR workflows, UDG can reduce carryover contamination from previous amplicons.
Explore →2× Taq DNA Polymerase Mix
A premixed PCR reagent containing Taq DNA polymerase, dNTPs, Mg²⁺ and buffer components for routine amplification.
Explore →Questions
Can UDG be added directly to every PCR system?
No. Validate nucleotide composition, enzyme compatibility and thermal cycling before changing an existing workflow.
Does this approach eliminate all contamination?
It reduces risk from certain residual amplicons, but laboratory zoning, consumable control and good practice remain necessary.
Discuss Your Application
Implementation conditions should be validated for your materials and process.
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