Creese AJ, Cooper HJ. Separation of cis and trans Isomers of Polyproline by FAIMS Mass Spectrometry.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016;
27:2071-2074. [PMID:
27704474 PMCID:
PMC5088216 DOI:
10.1007/s13361-016-1482-1]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/12/2016] [Accepted: 08/12/2016] [Indexed: 06/06/2023]
Abstract
High field asymmetric waveform ion mobility spectrometry (FAIMS) is well-established as a tool for separating peptide isomers (sequence inversions and post-translationally modified localization variants). Here, we demonstrate the FAIMS is able to differentiate cis and trans isomers of polyproline. Polyproline assumes an all-cis conformation-the PPI helix-in 1-propanol, and an all-trans conformation-the PPII helix-in aqueous solutions. Differentiation of these conformers may be achieved both through use of a cylindrical FAIMS device and a miniaturized ultrahigh field planar FAIMS device. Graphical Abstract ᅟ.
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