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Related Concept Videos

Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass. One common type of ionization, known as electron ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave behind a...
Mass Spectrometers01:16

Mass Spectrometers

This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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...
Mass Spectrum01:23

Mass Spectrum

A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...

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Navigating the Mass Spectrometry-Based Proteomic Data Using Free Computational Tools
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PeakML/mzMatch: a file format, Java library, R library, and tool-chain for mass spectrometry data analysis.

Richard A Scheltema1, Andris Jankevics, Ritsert C Jansen

  • 1Groningen Bioinformatics Centre, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands.

Analytical Chemistry
|March 16, 2011
PubMed
Summary

A new Peak Markup Language (PeakML) format and mzMatch software toolkit facilitate mass spectrometry data exchange. This enables flexible integration of diverse analysis methods for improved research outcomes.

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Area of Science:

  • * Mass Spectrometry Data Analysis
  • * Bioinformatics
  • * Computational Chemistry

Background:

  • * High-resolution mass spectrometry generates vast datasets requiring advanced analysis.
  • * Heterogeneous file formats and monolithic software hinder flexible integration of mass spectrometry data analysis methods.
  • * Existing formats like mzXML, mzData, and mzML address raw data access but not processed data exchange.

Purpose of the Study:

  • * To introduce Peak Markup Language (PeakML) as a standardized format for processed mass spectrometry data.
  • * To present the mzMatch open-source Java toolkit for customizable mass spectrometry data processing pipelines.
  • * To demonstrate the interoperability and flexibility offered by PeakML for data exchange between different software tools.

Main Methods:

  • * Development of the PeakML format for uniform exchange of processed and result data.
  • * Creation of the mzMatch toolkit for processing, filtering, and annotating mass spectra in customizable pipelines.
  • * Integration of PeakML with existing tools like XCMS to showcase interoperability.

Main Results:

  • * PeakML provides a simple and powerful format for exchanging processed mass spectrometry data.
  • * The mzMatch toolkit enables flexible, customizable data processing and analysis.
  • * PeakML facilitates seamless integration of data processing tools, exemplified by XCMS integration.
  • * Direct access to full mass trace information enhances result verification in downstream analyses.

Conclusions:

  • * PeakML and mzMatch offer a robust solution for the flexible integration and exchange of processed mass spectrometry data.
  • * The developed tools promote interoperability between different software, enhancing the utility of mass spectrometry data.
  • * Freely available software and resources encourage community adoption and further development in mass spectrometry data analysis.