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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Anal Bioanal Chem. 2015 Feb 6;407(9):2519–2528. doi: 10.1007/s00216-015-8480-1

Fig. 3.

Fig. 3

The MS2 spectrum of the [M – H]− ions of lysyl-(17:0/15:0)(15:0/15:0)-CL at m/z 1452.0 (a), and its MS3 spectra of the ion of m/z 1249.8 (1452 → 1249) (b), and its MS4 spectrum of the ion of m/z 709 (1452 → 1249 → 709) (c). The ion of m/z 1249 arises from internal loss of a lysylglycerol residue which is unique to lysyl-CL (the proposed fragmentation pathways are shown in Scheme 1).