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Related Concept Videos

SDS-PAGE01:27

SDS-PAGE

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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...
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Two-dimensional Gel Electrophoresis01:22

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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...
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Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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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,...
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Combining Non-reducing SDS-PAGE Analysis and Chemical Crosslinking to Detect Multimeric Complexes Stabilized by Disulfide Linkages in Mammalian Cells in Culture
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Speeding up SDS-PAGE: Theory and experiment.

Maria K Koshkina1, Mikhail D Shelomov1, Anastasia A Pometun1,2

  • 1Department of Chemical Enzymology, Faculty of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation.

Electrophoresis
|April 19, 2023
PubMed
Summary

Accelerate Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) by optimizing buffer and voltage. This method reduces runtimes from 90 to 18 minutes without compromising band resolution.

Keywords:
Laemmli electrophoresisSDS-PAGEprotein electrophoresis acceleration

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biotechnology

Background:

  • Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) is a fundamental technique for protein separation.
  • Traditional SDS-PAGE protocols can be time-consuming, limiting throughput in research and diagnostics.
  • There is a need for faster SDS-PAGE methods without sacrificing analytical resolution.

Purpose of the Study:

  • To develop an optimized and accelerated Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) protocol.
  • To significantly reduce the experimental runtime of SDS-PAGE.
  • To maintain or improve protein band resolution during accelerated electrophoresis.

Main Methods:

  • Experimental optimization of SDS-PAGE conditions.
  • Twofold dilution of the gel buffer.
  • Supplementation of the buffer with low-concentration glycine.
  • Application of higher voltage during electrophoresis.
  • Theoretical description to support experimental findings.

Main Results:

  • Reduced SDS-PAGE runtime from 90 minutes to 18 minutes.
  • Achieved accelerated electrophoresis without compromising band resolution compared to the standard Laemmli method.
  • Demonstrated the effectiveness of buffer modification and increased voltage for faster separation.

Conclusions:

  • The proposed optimized SDS-PAGE protocol significantly accelerates the technique.
  • This accelerated method maintains high-resolution protein separation.
  • The approach is adaptable for use in other SDS-PAGE variants, offering broad applicability.