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Related Concept Videos

Overview of DNA Repair02:25

Overview of DNA Repair

In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
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Next-generation Sequencing03:00

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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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Although all next-generation methods use different technologies, they all share a set of standard features.

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Related Experiment Video

Updated: Jul 13, 2026

Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts
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[Recent advancement in relationship between DNA degradation and postmortem interval].

Lu-gui Hao1, Shi-Xiong Deng, Xin-Cai Zhao

  • 1Department of Forensic Medicine, Chongqing Medical University, Chongqing, China.

Fa Yi Xue Za Zhi
|July 11, 2007
PubMed
Summary

Forensic DNA analysis offers a novel method for determining the postmortem interval (PMI), overcoming limitations of traditional techniques. This approach correlates DNA degradation patterns with the time since death, improving accuracy in forensic investigations.

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Last Updated: Jul 13, 2026

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Advanced Confocal Microscopy Techniques to Study Protein-protein Interactions and Kinetics at DNA Lesions
12:43

Advanced Confocal Microscopy Techniques to Study Protein-protein Interactions and Kinetics at DNA Lesions

Published on: November 12, 2017

Area of Science:

  • Forensic Science
  • Molecular Biology
  • Genetics

Context:

  • Accurate determination of postmortem interval (PMI) is crucial in forensic science.
  • Traditional PMI estimation methods present significant challenges and limitations in accuracy.
  • Emerging forensic DNA technology provides a new avenue for PMI estimation.

Purpose:

  • To review the invention and development of forensic DNA technology for PMI estimation.
  • To discuss the advantages and disadvantages of using DNA degradation for PMI determination.
  • To explore potential future applications of DNA-based PMI analysis in forensics.

Summary:

  • Forensic DNA technology leverages the correlation between DNA degradation and the postmortem interval.
  • This method offers potential advantages over conventional techniques for estimating time since death.
  • The review covers the technology's origins, evolution, benefits, drawbacks, and future prospects.

Impact:

  • Enhances the accuracy and reliability of postmortem interval determination in forensic casework.
  • Provides a valuable tool for forensic practitioners, aiding in criminal investigations.
  • Paves the way for future advancements in molecular-based forensic analysis.