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Related Concept Videos

High-Performance Liquid Chromatography: Introduction01:11

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Peptide Identification Using Tandem Mass Spectrometry01:33

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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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3D HPLC-MS with Reversed-Phase Separation Functionality in All Three Dimensions for Large-Scale Bottom-Up Proteomics

Vic Spicer1, Peyman Ezzati1, Haley Neustaeter2

  • 1Manitoba Centre for Proteomics and Systems Biology, University of Manitoba , 799 JBRC, 715 McDermot Avenue, Winnipeg, Manitoba R3E 3P4, Canada.

Analytical Chemistry
|February 7, 2016
PubMed
Summary
This summary is machine-generated.

Three-dimensional liquid chromatography coupled with mass spectrometry (3D LC-MS/MS) significantly enhances proteome coverage and peptide identification. This advanced separation method provides deeper insights into complex proteomic samples, improving protein and peptide quantification for large-scale studies.

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Mass Spectrometry

Background:

  • Increasing complexity of proteomic samples necessitates advanced analytical techniques for deeper proteome coverage.
  • Development of improved mass spectrometry (MS) instruments and multidimensional separation schemes is crucial for comprehensive proteomic analysis.

Purpose of the Study:

  • To evaluate the depth of proteome coverage and peptide retention information using one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) LC-MS/MS protocols.
  • To optimize separation orthogonality and MS instrument utilization through variations in eluent pH and ion-pairing modifier hydrophobicity.

Main Methods:

  • Application of 1D, 2D, and 3D reversed-phase C18 liquid chromatography-tandem mass spectrometry (LC-MS/MS) protocols to a tryptic digest of Jurkat cell lysate.
  • The 2D protocol utilized a high pH-low pH scheme with 21 concatenated fractions.
  • The 3D protocol involved analyzing six concatenated fractions from the first dimension (C18, heptafluorobutyric acid) using the identical 2D LC-MS procedure, increasing analysis time and sample load significantly compared to 1D.

Main Results:

  • Acquisition over 189 hours in 3D mode identified approximately 14,000 proteins and 250,000 unique peptides.
  • Estimated dynamic range increased from 10(4.2) in 1D to 10(5.6) in 2D and 10(6.2) in 3D LC-MS/MS.
  • Uniform distribution of identifications across fractions and chromatographic time indicated good separation orthogonality.

Conclusions:

  • The developed 3D LC-MS/MS protocol offers scalable proteome coverage and high-quality peptide retention data for large-scale bottom-up proteomics.
  • This method is suitable for both protein identification and the collection of peptide retention datasets for targeted quantitative applications.
  • The protocol's amenability to peptide retention prediction in all dimensions enhances its utility for advanced proteomic analyses.