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Related Concept Videos

Southern Blot02:57

Southern Blot

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Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
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Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
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In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
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Related Experiment Video

Updated: Jun 30, 2025

Genetic Variant Detection in the CALR gene using High Resolution Melting Analysis
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Genetic Variant Detection in the CALR gene using High Resolution Melting Analysis

Published on: August 26, 2020

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DNA melting analysis.

Carl T Wittwer1, Andrew C Hemmert2, Jana O Kent1

  • 1Department of Pathology, University of Utah, Salt Lake City, UT, USA.

Molecular Aspects of Medicine
|March 15, 2024
PubMed
Summary
This summary is machine-generated.

DNA melting analysis, using Polymerase Chain Reaction (PCR) products, offers a powerful method for genetic variant detection and verification. High-resolution melting techniques enable precise genotyping and heterozygote scanning for diverse applications.

Keywords:
GenotypingHigh resolution meltingMethylationMolecular diagnosticsNucleic acidScanning

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • DNA melting is a fundamental property measurable by absorbance or fluorescence.
  • Polymerase Chain Reaction (PCR) amplifies DNA, enabling direct monitoring with fluorescent probes or dyes.
  • Fluorescent dyes and probes offer distinct methods for analyzing PCR products.

Purpose of the Study:

  • To highlight advances in amplicon melting techniques for DNA analysis.
  • To showcase the utility of high-resolution melting for genotyping and variant detection.
  • To introduce prediction tools and novel applications of DNA melting analysis.

Main Methods:

  • Utilized real-time instruments with fluorescently labeled probes or dyes for monitoring PCR products.
  • Employed high-resolution melting instruments for detailed analysis of amplicon melting curves.
  • Incorporated prediction programs (e.g., uMelt) for modeling amplicon melting behavior.

Main Results:

  • High-resolution melting accurately genotypes single base variants and small insertions/deletions.
  • It enables heterozygote scanning within PCR products.
  • Advances include improved detection of multiple products, taxonomic identification, and high-speed/parallel melting.

Conclusions:

  • Amplicon melting is a versatile tool for genetic analysis, including methylation assessment and copy number determination.
  • It offers a simple, inexpensive, and powerful approach for research and emerging clinical diagnostics.
  • Web-based tools enhance the prediction and verification of amplicon melting curves.