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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...

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Updated: May 8, 2026

DNA Methylation: Bisulphite Modification and Analysis
12:34

DNA Methylation: Bisulphite Modification and Analysis

Published on: October 21, 2011

Forensic DNA methylation profiling--potential opportunities and challenges.

Athina Vidaki1, Barbara Daniel, Denise Syndercombe Court

  • 1Department of Forensic and Analytical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, UK. athina.a.vidaki@kcl.ac.uk

Forensic Science International. Genetics
|August 17, 2013
PubMed
Summary
This summary is machine-generated.

Epigenetic markers, like DNA methylation patterns, offer new forensic tools beyond DNA sequencing. These markers can aid in identifying individuals, tissues, and age, complementing traditional forensic genetics.

Keywords:
Age determinationBody fluid identificationCause of deathDNA methylationEpigenetic markersGenetic imprinting

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Area of Science:

  • Forensic genetics
  • Epigenetics
  • Molecular biology

Background:

  • DNA sequencing is a primary forensic tool for identification and characterization.
  • Heritable changes in gene function can occur independently of DNA sequence variations.
  • Epigenetic markers, particularly DNA methylation, have emerged as significant in forensic science.

Purpose of the Study:

  • To review the forensic applications of DNA methylation profiling.
  • To highlight the advantages of using epigenetic markers in forensic investigations.
  • To discuss the limitations of forensic DNA methylation analysis.

Main Methods:

  • Review of current literature on epigenetic markers in forensics.
  • Analysis of DNA methylation patterns for forensic applications.
  • Comparative study of DNA sequencing versus epigenetic profiling.

Main Results:

  • DNA methylation profiling can assist in differentiating monozygotic twins.
  • Epigenetic markers can help determine the tissue source of a biological sample.
  • Age determination of tissue donors is a potential application of DNA methylation analysis.

Conclusions:

  • Forensic DNA methylation profiling offers significant advantages for various investigative scenarios.
  • Epigenetic analysis provides complementary information to traditional DNA sequencing.
  • Further research is needed to overcome the limitations of forensic DNA methylation profiling.