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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...
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...
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...
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...
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,...
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...

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Cationic separation of medium strong bases by electrophoretic focusing on inverse electromigration dispersion profile. Sensitive analysis of beta-blockers in blood and water with ESI-MS detection.

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Recent progress in analytical capillary isotachophoresis (2018 - March 2022).

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Cationic electrophoretic focusing on inverse electromigration dispersion profile with ESI-MS detection. New capillary electrophoretic method for high-sensitivity analysis of 2-hydroxy-s-triazines in waters.

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Related Experiment Video

Updated: Jun 22, 2026

Electrophoretic Separation of Proteins
08:17

Electrophoretic Separation of Proteins

Published on: June 12, 2008

Electrophoretic sample stacking.

Petr Gebauer1, Petr Bocek

  • 1Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic, Brno, Czech Republic. gebauer@iach.cz

Electrophoresis
|June 12, 2009
PubMed
Summary

Sample stacking enhances electrophoresis sensitivity and efficiency. A unified theory based on moving boundaries offers a general approach for successful sample stacking applications.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Molecular Biology

Background:

  • Sample stacking is crucial for improving sensitivity and efficiency in electrophoresis.
  • Diverse practical procedures and nomenclature obscure a unified understanding of sample stacking.

Observation:

  • The complexity arises from the independent historical development of chromatographic and isotachophoretic methods.
  • A unified theoretical framework is achievable.

Findings:

  • A general approach utilizing a moving self-sharpening boundary provides fundamental theory and criteria for effective sample stacking.
  • This unified view simplifies the understanding and application of sample stacking techniques.

Implications:

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Multimer-PAGE: A Method for Capturing and Resolving Protein Complexes in Biological Samples

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Analysis of Mitochondrial Respiratory Chain Complexes in Cultured Human Cells using Blue Native Polyacrylamide Gel Electrophoresis and Immunoblotting
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Analysis of Mitochondrial Respiratory Chain Complexes in Cultured Human Cells using Blue Native Polyacrylamide Gel Electrophoresis and Immunoblotting

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Last Updated: Jun 22, 2026

Electrophoretic Separation of Proteins
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Analysis of Mitochondrial Respiratory Chain Complexes in Cultured Human Cells using Blue Native Polyacrylamide Gel Electrophoresis and Immunoblotting

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  • Standardized theory and criteria will facilitate broader and more successful implementation of sample stacking.
  • Future research can build upon this unified framework to further optimize electrophoretic analyses.