MS3 eliminates ratio distortion in isobaric labeling-based multiplexed quantitative proteomics

Lily Ting,R. Rad,S. Gygi,W. Haas

Published 2011 in Nature Methods

ABSTRACT

Quantitative mass spectrometry–based proteomics is highly versatile but not easily multiplexed. Isobaric labeling strategies allow mass spectrometry–based multiplexed proteome quantification; however, ratio distortion owing to protein quantification interference is a common effect. We present a two-proteome model (mixture of human and yeast proteins) in a sixplex isobaric labeling system to fully document the interference effect, and we report that applying triple-stage mass spectrometry (MS3) almost completely eliminates interference.

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