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. Author manuscript; available in PMC: 2021 May 6.
Published in final edited form as: J Am Soc Mass Spectrom. 2020 Apr 14;31(5):1093–1103. doi: 10.1021/jasms.0c00025

Figure 1.

Figure 1.

CID spectra of (a) [PE P-18:0/18:1(9Z) - H]− (m/z 728.5), (b) [PE O-16:0/18:1(9Z) H]− (m/z 702.5), and (c) [PE 16:0/18:1(9Z)-H]− (m/z 716.5) obtained via charge inversion ion/ion reaction. Product ion spectra obtained via ion-trap CID of mass-selected (d) [PE P-18:0/18:1 (9Z) - H - R2’CH=C=O]− (m/z 464.3), (e) [PE O-16:0/18:1(9Z) - H - R2’CH=C=O]− (m/z 438.3), and (f) [PE 16:0/18:1(9Z) - H - R2’CH=C=O]− (m/z 452.3). The lightning bolt () indicates the ion subjected to ion-trap CID