Fig. 2. LC-MS/MS analysis of lysine showing the same neutral loss (63 Da) with variations in CE in the same injection. The subtle mass offset of 0.001 in the product ion allows the software to treat each transition independently.
Abbreviation: LC-MS/MS, liquid chromatography-tandem mass spectrometry; CE, collision energy; cps, counts-per-second

Ann Lab Med 2022;42:121~140 https://doi.org/10.3343/alm.2022.42.2.121