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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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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Sanger Sequencing

DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...

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Updated: Jul 3, 2026

Multiplexed Analysis of Retinal Gene Expression and Chromatin Accessibility Using scRNA-Seq and scATAC-Seq
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Assembling DNA barcodes. Analytical protocols.

Jeremy R deWaard1, Natalia V Ivanova, Mehrdad Hajibabaei

  • 1Department of Integrative Biology, Biodiversity Institute of Ontario, University of Guelph, Guelph, Canada.

Methods in Molecular Biology (Clifton, N.J.)
|July 23, 2008
PubMed
Summary
This summary is machine-generated.

The Barcode of Life initiative uses DNA sequencing to identify species. Protocols for animal DNA barcoding are detailed, aiding in species discovery and identification.

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Area of Science:

  • Genomics
  • Biodiversity Science
  • Molecular Biology

Background:

  • The Barcode of Life initiative aims to create a DNA-based identification system for eukaryotic life.
  • Significant progress has been made in developing DNA barcodes for the animal kingdom.

Purpose of the Study:

  • To detail protocols for assembling DNA barcode records for animals.
  • To support large-scale data collection and identify barcode regions for other eukaryotic kingdoms.

Main Methods:

  • Selection of a target gene region (cytochrome c oxidase I) for animal DNA barcoding.
  • Validation of the chosen gene region through pilot studies for species discovery and identification.

Main Results:

  • Pilot studies confirmed the effectiveness of cytochrome c oxidase I for species identification.
  • Established protocols provide a foundation for large-scale DNA barcode data assembly.

Conclusions:

  • DNA barcoding, particularly using cytochrome c oxidase I, is effective for animal species discovery and identification.
  • The developed protocols are applicable to a broader range of eukaryotic life.