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Related Concept Videos

PCR - Polymerase Chain Reaction01:32

PCR - Polymerase Chain Reaction

Overview
PCR01:32

PCR

Overview
Proofreading01:31

Proofreading

Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore,  it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme
Proofreading01:43

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...
Real Time RT-PCR02:57

Real Time RT-PCR

Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...

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Related Experiment Video

Updated: Jul 3, 2026

Polymerase Chain Reaction: Basic Protocol Plus Troubleshooting and Optimization Strategies
09:00

Polymerase Chain Reaction: Basic Protocol Plus Troubleshooting and Optimization Strategies

Published on: May 22, 2012

Polymerase chain reaction engineering.

J T Hsu1, S Das, S Mohapatra

  • 1Biopharmaceutical Technology Institute, Department of Chemical Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA.

Biotechnology and Bioengineering
|July 20, 1997
PubMed
Summary
This summary is machine-generated.

This study presents a mathematical model for polymerase chain reaction (PCR) to understand DNA amplification. The model incorporates enzyme kinetics and temperature effects, simulating PCR to analyze key parameter impacts.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Biophysical Chemistry

Background:

  • Polymerase Chain Reaction (PCR) is a fundamental technique for amplifying DNA.
  • Understanding the kinetics of PCR is crucial for optimizing DNA amplification efficiency.
  • Existing models may not fully capture the dynamic behavior of polymerase enzymes during PCR.

Purpose of the Study:

  • To develop a comprehensive mathematical model for Polymerase Chain Reaction (PCR).
  • To incorporate polymerase enzyme activity and deactivation as a function of temperature.
  • To simulate PCR to analyze the influence of various parameters on DNA generation.

Main Methods:

  • Developed a kinetic mathematical model for PCR, including DNA melting, primer annealing, and DNA synthesis.
  • Integrated temperature-dependent polymerase enzyme activity and deactivation into the model.
  • Performed computer simulations to evaluate the effects of cycle number, initial DNA/enzyme concentrations, extension time, temperature ramp, and enzyme deactivation.

Main Results:

  • The model successfully simulates DNA amplification under varying PCR conditions.
  • Identified key parameters significantly influencing DNA generation, including enzyme deactivation and extension time.
  • Demonstrated the utility of the model in predicting PCR outcomes and optimizing reaction parameters.

Conclusions:

  • The developed mathematical model provides a robust framework for understanding PCR dynamics.
  • Temperature-dependent enzyme kinetics are critical factors affecting PCR efficiency.
  • The simulation results offer valuable insights for optimizing experimental PCR protocols and improving DNA amplification yields.