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. Author manuscript; available in PMC: 2022 May 18.
Published in final edited form as: Anal Chem. 2021 May 6;93(19):7332–7340. doi: 10.1021/acs.analchem.1c01021

Figure 2.

Figure 2.

The comparison of the CID spectra among cerebrosides after gas-phase ion/ion reaction. (a) The post-ion/ion reaction spectrum of cerebroside anion with [Mg(Terpy)2]2+ cation. (b) The CID spectrum of the [α-GalCer–H+MgTerpy]+ (m/z 955.6). (c) The CID spectrum of the [β-GlcCer–H+MgTerpy]+ (m/z 955.6). (d) The CID spectrum of the [β-GalCer–H+MgTerpy]+ (m/z 955.6). The values inside the parenthesis indicate the neutral loss. The lightning bolt (🗲) signifies the collisionally activated precursor ion. The solid circle (●) indicates the mass selection in the negative ion mode analysis and the black and white squares (■/□) indicate the positive ion mode analysis with and without mass selection, respectively.