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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

8.3K
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...
8.3K
Electrophoresis: Overview01:20

Electrophoresis: Overview

5.0K
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...
5.0K
SDS-PAGE01:27

SDS-PAGE

36.0K
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...
36.0K
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

1.8K
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,...
1.8K
DNA Agarose Gel Electrophoresis02:35

DNA Agarose Gel Electrophoresis

120.2K
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...
120.2K
Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

1.6K
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...
1.6K

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Related Experiment Video

Updated: Mar 29, 2026

Denaturing Gradient Gel Electrophoresis DGGE
10:52

Denaturing Gradient Gel Electrophoresis DGGE

Published on: February 25, 2007

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Image Pretreatment Tools II: Normalization Techniques for 2-DE and 2-D DIGE.

Elisa Robotti1, Emilio Marengo2, Fabio Quasso2

  • 1Department of Sciences and Technological Innovation, University of Piemonte Orientale, Viale Michel 11, 15121, Alessandria, Italy. elisa.robotti@uniupo.it.

Methods in Molecular Biology (Clifton, N.J.)
|November 28, 2015
PubMed
Summary

Accurate protein quantification in gel electrophoresis is crucial for identifying biomarkers. Normalization methods reduce experimental variability in 2-DE and 2D DIGE, improving differential analysis accuracy.

Keywords:
2-D DIGEGel-electrophoresisNormalization

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Use of Two Dimensional Semi-denaturing Detergent Agarose Gel Electrophoresis to Confirm Size Heterogeneity of Amyloid or Amyloid-like Fibers
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Use of Two Dimensional Semi-denaturing Detergent Agarose Gel Electrophoresis to Confirm Size Heterogeneity of Amyloid or Amyloid-like Fibers

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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1
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Area of Science:

  • Proteomics
  • Biochemistry
  • Molecular Biology

Background:

  • Gel electrophoresis, particularly 2-DE, is used to analyze protein expression profiles in biological samples.
  • Experimental variability in sample preparation, reagents, and image acquisition can confound results.
  • Accurate protein abundance quantification is essential for identifying reliable biomarkers.

Purpose of the Study:

  • To describe widespread normalization procedures for gel electrophoresis.
  • To highlight the importance of normalization for reducing experimental noise and improving differential analysis.
  • To ensure robust candidate biomarker identification.

Main Methods:

  • Review and description of common normalization techniques.
  • Application of normalization to 2-DE (two-dimensional electrophoresis) maps.
  • Application of normalization to 2D DIGE (Difference Gel Electrophoresis) maps.

Main Results:

  • Normalization procedures are fundamental for reducing experimental variability in gel electrophoresis.
  • Proper normalization enhances the comparability of gel images.
  • Normalization significantly improves the accuracy of differential protein expression analysis.

Conclusions:

  • Normalization is critical for obtaining valid quantitative estimates of protein abundances.
  • Careful application of normalization procedures is necessary to avoid influencing final results.
  • Effective normalization enhances the reliability of biomarker discovery in proteomics studies.