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Fast Reactions

Fast reactions occurring in times shorter than the time needed to mix reactants pose a unique challenge for investigation. In a liquid-phase continuous-flow system, reactants A and B are swiftly pushed into the mixing chamber, where mixing occurs within 1 ms. The reaction mixture then flows through an observation tube, and one measures light absorption to determine species concentrations at various points of the tube. This method is most appropriate when relatively large volumes of reactants...
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Related Experiment Video

Updated: May 28, 2026

Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor
09:49

Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor

Published on: April 6, 2016

Rapid and efficient proteolysis through laser-assisted immobilized enzyme reactors.

Peng Zhang1, Mingxia Gao, Shaochun Zhu

  • 1Department of Chemistry and Institute of Biomedical Sciences, Fudan University, Shanghai 200433, China.

Journal of Chromatography. A
|October 26, 2011
PubMed
Summary

This study introduces laser-assisted immobilized enzyme reactors (IMER) for rapid protein digestion. This novel method significantly enhances proteolysis efficiency, enabling high-throughput protein identification in complex samples.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Biotechnology

Background:

  • Proteolysis is crucial for protein analysis.
  • Immobilized enzyme reactors (IMER) offer advantages for efficient enzymatic reactions.
  • Enhancing IMER efficiency is key for high-throughput proteomics.

Purpose of the Study:

  • To investigate the use of laser radiation to enhance proteolysis efficiency in IMER.
  • To develop and demonstrate a laser-assisted IMER for rapid protein digestion.
  • To evaluate the performance of laser-assisted IMER in complex sample analysis.

Main Methods:

  • Preparation of trypsin-based monolithic IMER in fused-silica capillaries.
  • Acryloylation of trypsin and in situ aqueous polymerization for immobilization.
  • Application of 808nm laser radiation to accelerate the digestion process.
  • Analysis of digested proteins (BSA, Cyt-c, β-casein) using MALDI-TOF-MS.
  • Application to a human serum fraction using 2-D SAX/RPLC separation.

Main Results:

  • Laser-assisted IMER achieved efficient protein digestion in 60 seconds.
  • High sequence coverage was obtained for standard proteins: BSA (33%), Cyt-c (73%), β-casein (22%).
  • Analysis of human serum identified 49 unique peptides from 5 proteins, demonstrating applicability to complex samples.

Conclusions:

  • Laser-assisted IMER is a highly efficient platform for rapid protein digestion.
  • This method significantly improves proteolysis speed and efficiency compared to traditional methods.
  • Laser-assisted IMER shows great promise for high-throughput protein identification in proteomics.