Method for Highly Multiplexed Quantitation of Peptides by Mass Spectrometry and Labeling Reagent Sets Therefor
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United States of America Patent
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Jun 16, 2016
app pub date -
Dec 14, 2015
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May 10, 2012
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Disclosed herein are isobaric labeling reagent sets useful for multiplexed quantitation of peptides. The isobaric labeling reagent sets include a collection of at least two isobaric labeling reagents having first and second reporter groups with the same nominal mass but different isotopic substitutions and consequently different exact masses. Mass spectrometric analysis of the labeled samples is performed using a mass analyzer, such as an Orbitrap mass analyzer, capable of adequately resolving the ions of the first and second reporter groups. Reagent sets of the foregoing description may provide a degree of multiplexing in reporter ion quantitation experiments that is expanded relative to conventional labeling reagent sets, thereby reducing the number of chromatographic runs required for analysis and improving sample throughput.
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