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Microflow-based automated chemistries: application to protein sequencing.

M Powell1, P Tempst

  • 1Protein Center and Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.

Analytical Chemistry
|March 16, 2001
PubMed
Summary
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This study introduces a novel microflow instrument for automated, small-scale chemical and biochemical reactions. It enables highly sensitive protein analysis using minimal sample volumes, advancing analytical chemistry.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Instrumentation

Background:

  • Performing chemical and biochemical reactions at submicroliter scales presents challenges in sample handling and product recovery.
  • Existing methods often require larger sample volumes, limiting sensitivity and throughput.

Purpose of the Study:

  • To develop a microflow-based instrument for automated, small-scale chemical and biochemical reactions.
  • To enable near-quantitative recovery of reaction products in minimal volumes for subsequent analysis.
  • To demonstrate the instrument's compatibility with high-sensitivity analytical techniques.

Main Methods:

  • A microflow instrument was designed using rotary valves, capillary tubing, and miniaturized reaction vessels.
  • Precise control over flow paths, temperatures, and gas pressures was implemented.

Related Experiment Videos

  • Automated execution of complex biochemical procedures was performed.

    • Main Results:

    • The instrument successfully performed automated reactions using submicroliter volumes.
    • Close to 100% of reaction end products were recovered in < or = 5 microL.
    • Partial sequencing of 100 femtomole (fmol) of intact protein was achieved using Edman chemistry and capillary liquid chromatography, a record low for this method.

    Conclusions:

    • The developed microflow instrument facilitates highly sensitive analysis of minute sample quantities.
    • The system is compatible with capillary High-Performance Liquid Chromatography (HPLC) and potentially nanoelectrospray mass spectrometry.
    • This technology opens new avenues for miniaturized, automated biochemical assays and analyses.