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Related Concept Videos

Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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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Related Experiment Video

Updated: Jun 7, 2026

Digital Microfluidics for Automated Proteomic Processing
10:55

Digital Microfluidics for Automated Proteomic Processing

Published on: November 6, 2009

Multifunctional protein processing chip with integrated digestion, solid-phase extraction, separation and

Can Wang1, Abebaw B Jemere, D Jed Harrison

  • 1Department of Chemistry, University of Alberta, Edmonton, AB, Canada.

Electrophoresis
|October 23, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic device for rapid protein digestion and analysis. The integrated system significantly improves protein sequence coverage and reduces analysis time compared to traditional methods.

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Last Updated: Jun 7, 2026

Digital Microfluidics for Automated Proteomic Processing
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Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor
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Published on: August 6, 2018

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Microfluidics

Background:

  • Conventional proteomics workflows involve multiple offline steps, increasing analysis time and sample loss.
  • On-chip integration of sample preparation and analysis offers potential for improved efficiency and sensitivity.

Purpose of the Study:

  • To develop and evaluate a microfluidic device integrating tryptic digestion, solid-phase extraction (SPE), capillary electrophoresis (CE), and electrospray ionization mass spectrometry (ESI-MS).
  • To assess the performance of on-chip digestion and SPE for protein analysis, focusing on speed, efficiency, and sequence coverage.

Main Methods:

  • Fabrication of a microfluidic chip with channels for CE and packed beds for immobilized trypsin and reversed-phase SPE.
  • On-chip tryptic digestion of cytochrome c and subsequent SPE for peptide enrichment.
  • Analysis of digested and enriched peptides using on-chip CE-ESI-MS.

Main Results:

  • On-chip digestion of cytochrome c was completed in 3 minutes, significantly faster than conventional solution-phase digestion (2 hours).
  • SPE provided concentration enhancement factors of 4.4-12 for peptides and improved cytochrome c sequence coverage from 41.3% to 85.6% with a 13.3-fold concentration.
  • On-chip digestion combined with SPE yielded 76.0% sequence coverage for cytochrome c, outperforming on-chip digestion alone.

Conclusions:

  • The developed microfluidic device enables rapid and efficient on-chip tryptic digestion and peptide enrichment.
  • Integrated on-chip digestion and SPE significantly enhance protein analysis sensitivity and speed, reducing interference compared to offline methods.