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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 5.

Figure 5.

Representative scheme of DAG-like artifacts arising from in-source fragmentation of sodiated TAG counterparts in the positive-ion mode of MALDI-MSI. There is no selective dissociation of a certain fatty acyl chain at the sn-1, −2 or −3 position of the glycerol moiety when the fatty acyl chains are similar in their length and degrees of unsaturation. DAG and TAG represent diacylglycerol and triacylglycerol, respectively.