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The construction and use of a PCR internal control
1Department of Microbiology, Technical University of Gdańsk, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland.
Molecular and Cellular Probes
|October 21, 1998
Summary
A novel polymerase chain reaction (PCR) internal control was developed for accurate detection. This method synthesizes an internal control in one reaction, minimizing contamination risk and enabling quantitative PCR applications.
Area of Science:
- Molecular Biology
- Biotechnology
Background:
- Polymerase chain reaction (PCR) is a vital technique in molecular biology.
- Accurate quantification and detection in PCR assays require reliable internal controls.
- Existing methods may face challenges with contamination and specificity.
Purpose of the Study:
- To present a novel method for constructing and applying a PCR internal control.
- To demonstrate the utility of this internal control in a diagnostic PCR system.
- To explore its application in quantitative PCR (qPCR).
Main Methods:
- Synthesized an internal control within a single PCR reaction.
- Utilized primers with 5' over-hanging ends matching diagnostic primers.
- Employed 3' ends complementary to a defined DNA sequence (pUC19) for control specificity.
- Tested the internal control in a PCR detection system for Agrobacterium tumefaciens.
Main Results:
- The internal control demonstrated minimal risk of heteroduplex formation and non-specific products.
- No contamination of the internal control by target DNA was observed.
- Simultaneous amplification of different DNA fragments showed potential for product inhibition or enhancement based on molar ratios.
Conclusions:
- The developed PCR internal control offers a robust solution for diagnostic and quantitative applications.
- This method enhances the reliability of PCR-based detection systems.
- The internal control is suitable for use in detecting specific pathogens like Agrobacterium tumefaciens.