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. Author manuscript; available in PMC: 2010 Oct 27.
Published in final edited form as: Anal Chem. 2010 Feb 1;82(3):982–988. doi: 10.1021/ac902245p

Figure 2.

Figure 2

Atmospheric pressure imaging of positively charged molecular ions in a coronal section of the rat brain with LAESI MS reveals pairs of metabolite ions with highly correlated (ρij > 0.7) spatial distributions: (a) ethanolamine with (b) creatine; (c) γ-butyrolactone with (d) γ–aminobutyric acid and/or 2-methylalanine; (e) spermine with (f) PC(35:4) and PE(38:4); (g) cholesterol–H2O with (h) plasmalogens PC(O-33:3) and/or PE(O-36:3); and (i) heme with (j) α chain of hemoglobin. To the right of each pair is the corresponding colocalization map, Mij(r). See the definition in the text. Scale bars in white correspond to 1 mm.