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Related Concept Videos

DNA Agarose Gel Electrophoresis02:35

DNA Agarose Gel Electrophoresis

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.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
DNA Isolation01:24

DNA Isolation

DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
DNA Isolation01:34

DNA Isolation

DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.
Southern Blot02:57

Southern Blot

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.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Electrophoresis: Overview01:20

Electrophoresis: Overview

Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
There...
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...

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Electroeluting DNA Fragments
06:13

Electroeluting DNA Fragments

Published on: September 5, 2010

Electroeluting DNA fragments.

Ana L Zarzosa-Alvarez1, Antonio Sandoval-Cabrera, Ana L Torres-Huerta

  • 1Department of Genetics and Molecular Biology, Research and Advanced Studies Center of National Polytechnic Institute.

Journal of Visualized Experiments : Jove
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

Electroelution purifies DNA fragments from gels for molecular biology applications. This method yields clean DNA suitable for sequencing, cloning, and enzymatic modifications, offering a viable alternative to commercial kits.

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Electroeluting DNA Fragments
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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Purified DNA fragments are essential for various molecular biology techniques.
  • Common DNA purification methods involve gel electrophoresis followed by band excision.
  • Existing purification strategies include silica-based methods, DEAE-cellulose, crush and soak, electroelution, and commercial kits.

Purpose of the Study:

  • To describe and highlight the utility of the electroelution technique for DNA fragment purification.
  • To present electroelution as an effective method for obtaining high-purity DNA.

Main Methods:

  • DNA fragments are separated using gel electrophoresis.
  • Interest bands are excised from agarose or acrylamide gels.
  • Electroelution is performed using an electroeluter device with a salt cushion.

Main Results:

  • Electroelution yields very clean DNA fragments.
  • The purified DNA is suitable for diverse downstream applications.
  • The method relies on applying electric current to migrate DNA out of the gel matrix.

Conclusions:

  • Electroelution is a valuable technique for purifying DNA fragments for molecular biology.
  • The method provides high-purity DNA for applications like sequencing, cloning, and enzymatic reactions.
  • Laboratory availability of equipment influences the choice of DNA purification method.