Journal
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
Volume 27, Issue 5, Pages 795-799Publisher
SPRINGER
DOI: 10.1007/s13361-016-1367-3
Keywords
Ion mobility spectrometry; Differential IMS (FAIMS); Isotopic analyses; Isotopomers
Funding
- NIH K-INBRE [P20 GM103418]
- NSF EPSCoR [EPS-0903806]
- Office Of The Director
- Office of Integrative Activities [0903806] Funding Source: National Science Foundation
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Differential or field asymmetric waveform ion mobility spectrometry (FAIMS) operating at high electric fields fully resolves isotopic isomers for a peptide with labeled residues. The naturally present isotopes, alone and together with targeted labels, also cause spectral shifts that approximately add for multiple heavy atoms. Separation qualitatively depends on the gas composition. These findings may enable novel strategies in proteomic and metabolomic analyses using stable isotope labeling.
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