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Western Blotting

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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.
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Related Experiment Video

Updated: May 22, 2026

Determining Cell-surface Expression and Endocytic Rate of Proteins in Primary Astrocyte Cultures Using Biotinylation

Determining Cell-surface Expression and Endocytic Rate of Proteins in Primary Astrocyte Cultures Using Biotinylation

Published on: July 3, 2017

Cell surface protein biotinylation for SDS-PAGE analysis.

Giuliano Elia¹

¹University College Dublin, Belfield, Dublin, Ireland. Giuliano.Elia@ucd.ie

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

|May 16, 2012

Summary

This study details methods for isolating cell surface proteins using biotinylation and streptavidin affinity purification. These techniques advance quantitative proteomics for drug target discovery.

Area of Science:

Biochemistry
Proteomics
Cell Biology

Background:

Cell surface proteins are crucial in physiology and pathology, making them key targets for pharmaceutical development.
Studying cell surface proteins is challenging due to their inherent nature.
Biotinylation and streptavidin-based purification have emerged as powerful tools in quantitative proteomics.

Purpose of the Study:

To outline methods for enriching and purifying cell surface proteins.
To focus on cell surface biotinylation techniques using commercial reagents.
To describe the subsequent capture and release of biotinylated proteins for downstream analysis.

Main Methods:

Cell surface protein enrichment using biotinylating reagents.
Purification via avidin-affinity chromatography.

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Elution of biotinylated proteins for electrophoretic analysis.

Main Results:

Demonstration of effective cell surface protein enrichment and purification.
Facilitation of downstream proteomic analysis.
Advancement in quantitative proteomics methodologies.

Conclusions:

Biotinylation and avidin-affinity chromatography offer a robust approach for cell surface protein isolation.
These methods are vital for advancing the study of cell surface proteins as therapeutic targets.
The described techniques contribute significantly to quantitative proteomics research.