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Related Concept Videos

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...
Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such as  cells...
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...
SDS-PAGE01:27

SDS-PAGE

Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
A variation of gel electrophoresis, termed  polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
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,...
Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...

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Agarose Gel Electrophoresis for the Separation of DNA Fragments
07:10

Agarose Gel Electrophoresis for the Separation of DNA Fragments

Published on: April 20, 2012

Segmented field OFFGEL® electrophoresis.

Elena Tobolkina1, Fernando Cortés-Salazar, Dmitry Momotenko

  • 1Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

Electrophoresis
|October 23, 2012
PubMed
Summary
This summary is machine-generated.

A novel multielectrode system enhances protein separation efficiency in OFFGEL electrophoresis. This segmented electric field design improves speed, resolution, and collection while reducing heat, outperforming standard setups.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Biotechnology

Background:

  • Protein separation is crucial for biological and medical research.
  • Existing electrophoresis methods face limitations in efficiency and resolution.
  • OFFGEL electrophoresis offers unique separation capabilities but can be improved.

Purpose of the Study:

  • To develop and evaluate a multielectrode setup for enhanced protein OFFGEL electrophoresis.
  • To improve separation time, resolution, and protein collection efficiency.
  • To minimize Joule heating during the electrophoresis process.

Main Methods:

  • A novel seven-electrode system with six independent power supplies was designed.
  • Protein separation efficiency was compared against a standard two-electrode setup.
  • UV-Vis spectroscopy and MALDI-MS were used for quantification and identification.
  • Electrophoretic separation was simulated using the Nernst-Planck equation.

Main Results:

  • The multielectrode setup significantly improved protein separation efficiency.
  • Enhanced resolution, faster separation times, and higher collection efficiency were observed.
  • The segmented electric field minimized overall potential difference and Joule heating.
  • Simulation results guided optimization of the electrophoretic process.

Conclusions:

  • The developed multielectrode system offers a substantial advancement for protein OFFGEL electrophoresis.
  • This technology provides a more efficient, faster, and higher-resolution method for protein fractionation.
  • The findings have implications for various fields requiring precise protein analysis.