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Fig. 2 | BMC Cancer

Fig. 2

From: LC-MS based sphingolipidomic study on A549 human lung adenocarcinoma cell line and its taxol-resistant strain

Fig. 2

Differentiation of isomeric SPLs by accurate MS/MS. The extracted ion chromatogram of m/z 785.6423 at 5 ppm mass accuracy showed two peaks at 14.642 and 14.808 min. Targeted MS/MS of m/z 785.64 at respective time points gave distinct product ions corresponding to backbone of SM (d18:1/22:1) (m/z 264.3) and SM (d18:2/22:0) (m/z 262.3), providing evidence for the identification of these two species

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