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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
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...
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Electrophoresis: Overview01:20

Electrophoresis: Overview

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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
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
Southern Blot02:57

Southern Blot

24.5K
Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
24.5K
Western Blotting01:15

Western Blotting

22.1K
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
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Related Experiment Video

Updated: Mar 30, 2026

Electrophoretic Separation of Proteins
08:17

Electrophoretic Separation of Proteins

Published on: June 12, 2008

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Electroblotting from Polyacrylamide Gels.

Aaron Goldman1, Jeanine A Ursitti1, Jacek Mozdzanowski1

  • 1The Wistar Institute, Philadelphia, Pennsylvania.

Current Protocols in Protein Science
|November 3, 2015
PubMed
Summary

Protein electroblotting transfers proteins from polyacrylamide gels to membranes for sequencing and immunoblotting. This guide details methods using wet, semidry, and dry systems, plus protein elution techniques.

Keywords:
SDS-PAGE gel transferelectroblottingelectrotransferpolyacrylamide gel transferprotein transferwestern blotting

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Blue Native Polyacrylamide Gel Electrophoresis BN-PAGE for Analysis of Multiprotein Complexes from Cellular Lysates
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Electrophoretic Separation of Proteins
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Characterization of Multi-subunit Protein Complexes of Human MxA Using Non-denaturing Polyacrylamide Gel-electrophoresis
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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Proteomics

Background:

  • Protein transfer from polyacrylamide gels to membranes is crucial for downstream analyses.
  • Electroblotting was historically vital for protein sequencing via Edman chemistry.
  • Current primary application is for immunoblotting, but historical uses offer valuable insights.

Purpose of the Study:

  • To provide comprehensive protocols for electroblotting proteins from polyacrylamide gels.
  • To cover various transfer systems including wet, semidry, and dry methods.
  • To describe protein elution techniques from membranes for specialized applications.

Main Methods:

  • Electroblotting proteins onto polyvinylidene difluoride (PVDF) and nitrocellulose membranes.
  • Utilizing tank (wet) transfer systems.
  • Implementing semidry and dry electroblotting systems.
  • Protein elution using detergents or acidic extraction with organic solvents.

Main Results:

  • Detailed procedures for efficient protein transfer across different electroblotting setups.
  • Successful application of transfer methods for subsequent analyses.
  • Demonstrated efficacy of various elution strategies for retrieved proteins.

Conclusions:

  • Electroblotting remains a versatile technique for protein isolation and analysis.
  • The described protocols facilitate protein transfer and elution for diverse research needs.
  • This unit serves as a practical guide for researchers employing protein electroblotting techniques.