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Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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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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MALDI-TOF Mass Spectrometry01:19

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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
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Electrospray Ionization (ESI) Mass Spectrometry01:12

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Single-Injection Multi-Omics Analysis by Direct Infusion Mass Spectrometry.

Yuming Jiang1,2,3, Ivan Salladay-Perez4, Amanda Momenzadeh1,2,3

  • 1Department of Computational Biomedicine, Cedars Sinai Medical Center, Los Angeles, California, USA.

Angewandte Chemie (International Ed. in English)
|March 30, 2026
PubMed
Summary
This summary is machine-generated.

Single-injection multi-omics analysis by direct infusion (SMAD) significantly reduces run times for large-scale studies. This high-throughput method enables rapid, cost-effective quantification of proteins and metabolites from a single sample.

Keywords:
chemical biologylipidomicsmacrophagesmetabolomicsproteomics

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Systems Biology

Background:

  • Combined multi-omics analyses (proteomics, metabolomics, lipidomics) typically involve lengthy liquid chromatography-mass spectrometry (LC-MS) runs.
  • Long run times increase costs and limit throughput for large-scale biological studies.

Purpose of the Study:

  • To develop an integrated platform for rapid, single-injection multi-omics analysis without liquid chromatography.
  • To significantly enhance throughput and reduce costs for large-scale omics studies.

Main Methods:

  • Development of single-injection multi-omics analysis by direct infusion (SMAD) platform.
  • Integration of ion mobility mass spectrometry and custom software tools.
  • Validation through case studies including cell polarization, pilot drug screening, and high-throughput drug screening.

Main Results:

  • SMAD enables quantification of over 9000 metabolite m/z features and over 1300 proteins in under 5 minutes per sample.
  • Demonstrated efficiency and reliability across diverse biological models and screening applications.
  • Successful discovery and validation of proteomic-metabolomic relationships using machine learning.

Conclusions:

  • SMAD offers a transformative approach to multi-omics analysis, drastically improving speed and cost-effectiveness.
  • The platform facilitates deeper biological insights through rapid, integrated proteomic and metabolomic data acquisition.
  • SMAD is poised to accelerate large-scale biological and drug discovery research.