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SDS-PAGE

SDS-PAGE

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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Related Experiment Video

Updated: Nov 18, 2025

Microsampling in Targeted Mass Spectrometry-Based Protein Analysis of Low-Abundance Proteins

Microsampling in Targeted Mass Spectrometry-Based Protein Analysis of Low-Abundance Proteins

Published on: January 13, 2023

SCASP: A Simple and Robust SDS-Aided Sample Preparation Method for Proteomic Research.

Guohong Gan¹, Xiao Xu², Xi Chen³

¹State Key Laboratory of Cellular Stress Biology, Innovation Center for Cellular Signaling Network, School of Life Sciences, Xiamen University, Xiamen, China.

Molecular & Cellular Proteomics : MCP

|February 7, 2021

Summary

This study introduces a new method using cyclodextrin (CD) to remove SDS from proteomic samples, simplifying sample preparation. This SDS-CD approach is fast, robust, and compatible with downstream LC-MS analysis.

Keywords:

SDC SDS sample preparation

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Area of Science:

Proteomics
Analytical Chemistry
Biochemistry

Background:

Sodium dodecyl sulfate (SDS) is essential for proteomic sample preparation.
SDS interferes with liquid chromatography (LC) and electrospray ionization (ESI) mass spectrometry (MS).
Current SDS removal methods are often inefficient, time-consuming, and lack reproducibility.

Purpose of the Study:

To develop a simple, fast, and robust method for SDS removal in proteomics.
To enable direct tryptic digestion after SDS-assisted sample preparation.
To improve compatibility of SDS-treated samples with LC-MS analysis.

Main Methods:

Development of an SDS-cyclodextrin (CD)-assisted sample preparation technique.
Utilizing CD to bind SDS and form soluble CD-SDS complexes.
Direct tryptic digestion of samples treated with the SDS-CD method.

Main Results:

The SDS-CD method effectively sequesters SDS, preventing interference with downstream processes.
Direct tryptic digestion is feasible with the SDS-CD-assisted preparation.
The method is demonstrated to be simple, fast, and robust for proteomics.

Conclusions:

SDS-cyclodextrin-assisted sample preparation offers a significant improvement over existing SDS removal strategies.
This method streamlines proteomic workflows by enabling direct digestion and LC-MS compatibility.
The SDS-CD technique provides a robust and efficient solution for SDS removal in proteomics research.