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. Author manuscript; available in PMC: 2026 Apr 1.
Published in final edited form as: Int J Mass Spectrom. 2025 Feb 15;510:117421. doi: 10.1016/j.ijms.2025.117421

Figure 3.

Figure 3.

PCA plots of seven E. coli strains using (A) the PS-IM-MS/MS method in the Data Fusion mode of the extracted PCs of the negative and positive ion modes information and the LC-IM-MS/MS method in the (B) negative and (C) positive ion modes. The E. coli strains are indicated by color and shape as follows: BL21 (Black circles), C41(Red triangles pointing up), CSH23 (Blue triangles pointing down), DH10B (Green diamonds), DH5α (Magenta squares), K12 (Orange stars), and S17–1 λpir (Wine hexagons). Adapted with permission from Journal of the American Society for Mass Spectrometry, 34 (6), Strain-level discrimination of bacteria by liquid chromatography and paper spray ion mobility-mass spectrometry, 1125–1135, Copyright 2023, American Chemical Society.