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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...
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...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

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Related Experiment Video

Updated: Jun 23, 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

High-resolution large-gel 2DE.

Claus Zabel1, Joachim Klose

  • 1Charite - University Medicine Berlin, Institute for Human Genetics, Augustenburger Platz 1, 13353, Berlin, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2009
PubMed
Summary
This summary is machine-generated.

This study presents an improved two-dimensional gel electrophoresis (2DE) protocol for high-resolution proteome analysis. The optimized method achieves exceptional reproducibility and separates over 10,000 protein spots from complex mixtures.

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Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting
10:51

Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting

Published on: April 10, 2014

Related Experiment Videos

Last Updated: Jun 23, 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

Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting
10:51

Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting

Published on: April 10, 2014

Area of Science:

  • Proteomics
  • Biochemistry
  • Molecular Biology

Background:

  • Two-dimensional gel electrophoresis (2DE) is a cornerstone technique for proteome analysis.
  • Continuous refinement of 2DE protocols is crucial for enhancing resolution and reproducibility.
  • Previous 2DE methods have limitations in resolving complex protein mixtures.

Purpose of the Study:

  • To present an updated and highly refined two-dimensional gel electrophoresis (2DE) protocol.
  • To achieve unprecedented resolution and reproducibility in proteome analysis.
  • To demonstrate the protocol's versatility across various biological sample types.

Main Methods:

  • Utilized large-format (46 x 30 cm) gels for enhanced separation.
  • Employed ready-made, batch-produced, and frozen gel solutions for improved consistency.
  • Validated the protocol on diverse samples including tissue extracts, cultured cells, and subcellular fractions.

Main Results:

  • Achieved separation of over 10,000 protein spots from mouse tissue, representing the highest resolution reported for 2DE.
  • Demonstrated high-quality 2DE patterns with excellent spot integrity, intensity, and low background.
  • Confirmed extremely satisfactory reproducibility of protein patterns across multiple experiments.

Conclusions:

  • The presented 2DE protocol offers superior resolution and reproducibility for complex proteome analysis.
  • The method is compatible with advanced techniques like differential in-gel electrophoresis (DIGE) and modern analysis software.
  • This protocol facilitates robust protein identification via mass spectrometry.