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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Mass Spectrom Rev. 2020 Sep 30;41(1):15–31. doi: 10.1002/mas.21659

Figure 2.

Figure 2.

Structural illustration of DMPE fragment ions generated from in-source fragmentation of small anion adducts of PC counterparts and of their PE isomers. In the scheme, m and n denote the total number of carbon atoms and the total number of double bonds in two fatty acyls, respectively. The total number of carbon atoms in R1’ and R2’ in PE species is 2 carbon atoms more than that in R1 and R2 present in DMPE counterparts.