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Related Concept Videos

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...
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,...
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...
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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Related Experiment Video

Updated: Jun 22, 2026

Selective Labelling of Cell-surface Proteins using CyDye DIGE Fluor Minimal Dyes
14:43

Selective Labelling of Cell-surface Proteins using CyDye DIGE Fluor Minimal Dyes

Published on: November 26, 2008

Non-classical 2-D electrophoresis.

Jacqueline Burré1, Ilka Wittig, Hermann Schägger

  • 1Department of Neuroscience, The University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, TX, USA.

Methods in Molecular Biology (Clifton, N.J.)
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

Non-classical 2-D electrophoresis (2-DE) techniques improve hydrophobic protein separation and native protein complex isolation. These advanced methods enable efficient micro-scale protein analysis, including for mass spectrometry.

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Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome

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Last Updated: Jun 22, 2026

Selective Labelling of Cell-surface Proteins using CyDye DIGE Fluor Minimal Dyes
14:43

Selective Labelling of Cell-surface Proteins using CyDye DIGE Fluor Minimal Dyes

Published on: November 26, 2008

Analysis of Thylakoid Membrane Protein Complexes by Blue Native Gel Electrophoresis
08:12

Analysis of Thylakoid Membrane Protein Complexes by Blue Native Gel Electrophoresis

Published on: September 28, 2018

Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome
12:34

Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome

Published on: April 2, 2018

Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Classical 2-D electrophoresis (IEF/SDS 2-DE) excels at separating complex protein mixtures but under-represents hydrophobic proteins.
  • Hydrophobic proteins often aggregate, posing challenges for traditional 2-D gel electrophoresis methods.
  • Existing techniques struggle with the comprehensive analysis of hydrophobic proteins and native protein complexes.

Purpose of the Study:

  • To introduce and detail non-classical 2-D electrophoresis (2-DE) techniques for improved protein separation.
  • To address the limitations of classical 2-DE in analyzing hydrophobic proteins and native protein complexes.
  • To present advanced electrophoretic methods for high-resolution protein analysis.

Main Methods:

  • Utilized BAC/SDS 2-DE and doubled SDS-polyacrylamide gel electrophoresis (dSDS-PAGE) for hydrophobic protein isolation.
  • Employed blue-native electrophoresis (BNE), clear-native electrophoresis (CNE), and high-resolution clear-native electrophoresis (hrCNE) for native protein complex separation.
  • Developed multi-dimensional electrophoretic systems, including BNE/SDS 2-DE and BNE/BNE 2-DE, for comprehensive protein analysis.

Main Results:

  • Non-classical 2-DE methods successfully isolated hydrophobic proteins often missed by classical techniques.
  • Native electrophoresis methods effectively separated intact protein complexes and supramolecular assemblies.
  • Integrated multi-dimensional approaches, including four-dimensional electrophoresis, minimized protein loss and enabled detailed analysis.

Conclusions:

  • Non-classical 2-DE techniques offer superior resolution and broader coverage for complex proteomes, especially for hydrophobic proteins.
  • Native electrophoresis methods provide a powerful alternative to chromatography for isolating native protein complexes.
  • Advanced multi-dimensional electrophoretic systems represent efficient micro-scale protocols for in-depth protein analysis, including mass spectrometry applications.