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Western Blotting

Western Blotting

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: Aug 21, 2025

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

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

Immunoblot Analysis of DIGE-Based Proteomics.

Martin Landsberger^1,2, Heinrich Brinkmeier³

¹Department of Biomedical Sciences, Institute of Health Research and Education, University of Osnabrück, Osnabrück, Germany. martin.landsberger@uni-osnabrueck.de.

Methods in Molecular Biology (Clifton, N.J.)

|November 15, 2022

Summary

Western blotting separates proteins by size using gel electrophoresis and antibody detection. This sensitive technique verifies results from fluorescence two-dimensional difference gel electrophoresis (2D-DIGE) proteomics experiments.

Keywords:

Antibodies Denatured proteins Electrophoresis Enhanced chemiluminescence (ECL)Immunoblotting Molecular weight Polyacrylamide gels

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Last Updated: Aug 21, 2025

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

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

Immunoblot Analysis

Immunoblot Analysis

Published on: June 20, 2008

High Throughput, Absolute Determination of the Content of a Selected Protein at Tissue Levels Using Quantitative Dot Blot Analysis QDB

High Throughput, Absolute Determination of the Content of a Selected Protein at Tissue Levels Using Quantitative Dot Blot Analysis QDB

Published on: August 21, 2018

Area of Science:

Biochemistry
Molecular Biology
Proteomics

Background:

Proteins are fundamental molecules in biological systems.
Accurate protein analysis is crucial for understanding cellular functions and disease mechanisms.
Gel electrophoresis and Western blotting are established techniques for protein separation and detection.

Purpose of the Study:

To describe the principles and applications of Western blotting.
To highlight Western blotting as a method for verifying proteomics data.
To explain the process of protein transfer and antibody-based detection.

Main Methods:

Proteins are separated based on size using gel electrophoresis.
Separated proteins are transferred to a nitrocellulose or polyvinylidene fluoride (PVDF) membrane.
Specific antibodies are used to detect target proteins on the membrane.
Visualization of detected proteins is achieved through various imaging methods.

Main Results:

Western blotting generates a replica of the protein separation pattern on the membrane.
The technique allows for sensitive and specific detection of proteins.
It provides a means to confirm findings from other proteomic analyses.

Conclusions:

Western blotting is a versatile and sensitive technique for protein analysis.
It serves as a critical validation tool for data generated by fluorescence two-dimensional difference gel electrophoresis (2D-DIGE).
The method is essential for confirming protein expression and modifications in various research settings.