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Cited by 2,500

The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.

A Model for Random Sampling and Estimation of Relative Protein Abundance in Shotgun Proteomics

Liu, Hongbin, Sadygov, Rovshan G., Yates, John R.·2004·Analytical Chemistry

Abstract

Proteomic analysis of complex protein mixtures using proteolytic digestion and liquid chromatography in combination with tandem mass spectrometry is a standard approach in biological studies. Data-dependent acquisition is used to automatically acquire tandem mass spectra of peptides eluting into the mass spectrometer. In more complicated mixtures, for example, whole cell lysates, data-dependent acquisition incompletely samples among the peptide ions present rather than acquiring tandem mass spectra for all ions available. We analyzed the sampling process and developed a statistical model to accurately predict the level of sampling expected for mixtures of a specific complexity. The model also predicts how many analyses are required for saturated sampling of a complex protein mixture. For a yeast-soluble cell lysate 10 analyses are required to reach a 95% saturation level on protein identifications based on our model. The statistical model also suggests a relationship between the level of sampling observed for a protein and the relative abundance of the protein in the mixture. We demonstrate a linear dynamic range over 2 orders of magnitude by using the number of spectra (spectral sampling) acquired for each protein.

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Metadata

Authors
Liu, H., Sadygov, R. G., & Yates, J. R.
Venue
Analytical Chemistry
Published
2004-06-02
Volume
76
Issue
14
Pages
4193-4201
ISSN
  • 0003-2700 (ISSN-L)
  • 1520-6882
OpenAlex
W1997504014
Cited by
2,500
References
2
FWCI
38.86
Type
journal article
Language
en
Open access
closed

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