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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2019 Feb 12;30(4):659–668. doi: 10.1007/s13361-018-02125-y

Figure 4.

Figure 4.

Generating Lipid Spectra (a) Dot product returned and %TIC explained for original MS/MS spectra after in-silico library generation from complex HAP1 cell extract using LipiDex spectral library (blue), complex HAP1 cell extract using LipidBlast spectral library (magenta), reference standard mix using HCD (green), and reference standard mix using ion trap CAD (orange). For clarity, the dot product and %TIC explained are additional displayed as density plots (bin width = 10) on each corresponding axis. (b) Density plots (bin width = 50) of the dot product returned for original MS/MS spectra from the correct lipid identification (colored) and the first incorrect identification (match). Note: for complex spectra which contained co-fragmented lipid species, these identifications were not counted as incorrect.