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J Biomed Biotechnol. 2010;2010:840518. doi: 10.1155/2010/840518. Epub 2009 Nov 10.

Mass spectrometry-based label-free quantitative proteomics.

Author information

1
Center on Proteolytic Pathways, Burnham Institute for Medical Research, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA.

Abstract

In order to study the differential protein expression in complex biological samples, strategies for rapid, highly reproducible and accurate quantification are necessary. Isotope labeling and fluorescent labeling techniques have been widely used in quantitative proteomics research. However, researchers are increasingly turning to label-free shotgun proteomics techniques for faster, cleaner, and simpler results. Mass spectrometry-based label-free quantitative proteomics falls into two general categories. In the first are the measurements of changes in chromatographic ion intensity such as peptide peak areas or peak heights. The second is based on the spectral counting of identified proteins. In this paper, we will discuss the technologies of these label-free quantitative methods, statistics, available computational software, and their applications in complex proteomics studies.

PMID:
19911078
PMCID:
PMC2775274
DOI:
10.1155/2010/840518
[Indexed for MEDLINE]
Free PMC Article

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