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images of three common lipids acquired in positive ion mode: left panel: phosphatidylcholine 34:1, m/z 760; middle panel: potassiated phosphatidylcholine 32:0, m/z 772; right panel: phosphatidylcholine 36:1, m/z 826. The color scale to the right of each panel represents the raw ion count. Scale bar: 5 mm.
