Differential ion mobility spectrometry (field asymmetric waveform ion mobility spectrometry (FAIMS)) is emerging as a broadly useful tool for separation of isomeric modified peptides with post-translational modifications (PTMs) attached to alternative residues. Such separations were anticipated to become more challenging for smaller PTMs and longer peptides. Here, we show that FAIMS can fully resolve localization variants involving a PTM as minuscule as methylation, even for larger peptides in the middle-down range.
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Univ Fed Rio de Janeiro, Dept Chem, LAGOA LADETEC, Ilha Fundao, BR-21941909 Rio De Janeiro, RJ, Brazil
Univ Helsinki, Dept Chem, Analyt Chem Lab, FI-00014 Helsinki, FinlandUniv Fed Rio de Janeiro, Dept Chem, LAGOA LADETEC, Ilha Fundao, BR-21941909 Rio De Janeiro, RJ, Brazil
Laakia, Jaakko
Kauppila, Tiina J.
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Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, FI-00014 Helsinki, FinlandUniv Fed Rio de Janeiro, Dept Chem, LAGOA LADETEC, Ilha Fundao, BR-21941909 Rio De Janeiro, RJ, Brazil
Kauppila, Tiina J.
Adarnov, Alexey
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Univ Helsinki, Dept Chem, Analyt Chem Lab, FI-00014 Helsinki, Finland
Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, FI-00014 Helsinki, FinlandUniv Fed Rio de Janeiro, Dept Chem, LAGOA LADETEC, Ilha Fundao, BR-21941909 Rio De Janeiro, RJ, Brazil
Adarnov, Alexey
Sysoev, Alexey A.
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Natl Res Nucl Univ MEPhl, Moscow 115409, Russia
Linantec Ltd, Moscow 115409, RussiaUniv Fed Rio de Janeiro, Dept Chem, LAGOA LADETEC, Ilha Fundao, BR-21941909 Rio De Janeiro, RJ, Brazil