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Related Concept Videos

MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

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...
Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

Matrix-Assisted Laser Desorption Ionization (MALDI)

Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
Rapid Identification of Pathogens01:25

Rapid Identification of Pathogens

MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...

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Related Experiment Video

Updated: Jul 15, 2026

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery
13:00

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Published on: April 17, 2012

Single-cell MALDI: a new tool for direct peptide profiling.

L Li1, R W Garden, J V Sweedler

  • 1Department of Chemistry and Beckman Institute, University of Illinois, Urbana, IL 61801, USA.

Trends in Biotechnology
|March 31, 2000
PubMed
Summary

Matrix-assisted laser desorption-ionization (MALDI) mass spectrometry (MS) offers rapid and sensitive analysis of peptides and proteins in complex samples. This technique enables molecular weight determination and profiling from single cells and tissues with minimal sample preparation.

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Whole-cell MALDI-TOF Mass Spectrometry is an Accurate and Rapid Method to Analyze Different Modes of Macrophage Activation
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Whole-cell MALDI-TOF Mass Spectrometry is an Accurate and Rapid Method to Analyze Different Modes of Macrophage Activation

Published on: December 26, 2013

Peptide and Protein Quantification Using Automated Immuno-MALDI (iMALDI)
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Peptide and Protein Quantification Using Automated Immuno-MALDI (iMALDI)

Published on: August 18, 2017

Related Experiment Videos

Last Updated: Jul 15, 2026

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery
13:00

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Published on: April 17, 2012

Whole-cell MALDI-TOF Mass Spectrometry is an Accurate and Rapid Method to Analyze Different Modes of Macrophage Activation
11:25

Whole-cell MALDI-TOF Mass Spectrometry is an Accurate and Rapid Method to Analyze Different Modes of Macrophage Activation

Published on: December 26, 2013

Peptide and Protein Quantification Using Automated Immuno-MALDI (iMALDI)
08:57

Peptide and Protein Quantification Using Automated Immuno-MALDI (iMALDI)

Published on: August 18, 2017

Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Proteomics

Background:

  • Matrix-assisted laser desorption-ionization (MALDI) mass spectrometry (MS) is a powerful technique for analyzing biomolecules.
  • It is particularly effective for determining the molecular weights of peptides and proteins.
  • MALDI-MS excels in analyzing complex biological samples, including those from single cells and small tissue biopsies.

Purpose of the Study:

  • To highlight the utility of MALDI-MS for peptide and protein analysis.
  • To present strategies for peptide identification and characterization of post-translational modifications.
  • To discuss recent technological advancements in MALDI-MS.

Main Methods:

  • MALDI-MS was employed for rapid and sensitive molecular weight determination.
  • Minimal sample preparation was required, focusing on cell isolation and matrix application.
  • Techniques for in situ peptide sequencing and spatial mapping were explored.

Main Results:

  • MALDI-MS successfully profiled peptides and proteins from single-cell and small tissue samples.
  • Strategies for peptide identification and post-translational modification analysis were effective.
  • Recent enhancements allow for in situ sequencing and spatial mapping of peptides.

Conclusions:

  • MALDI-MS is a versatile and sensitive tool for peptide and protein analysis in complex biological samples.
  • The technology supports detailed characterization, including post-translational modifications and spatial distribution.
  • Ongoing advancements continue to expand the capabilities of MALDI-MS in biological research.