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. Author manuscript; available in PMC: 2014 Jul 28.
Published in final edited form as: Curr Opin Microbiol. 2011 Dec 30;15(2):147–154. doi: 10.1016/j.mib.2011.12.009

Figure 3. Exploring metabolic exchange factors in the gut microbiome.

Figure 3

A. A hypothetical experiment is comparing germ-free versus gnotobiotic mouse (E. coli and K. pneumonia) gut to determine the role of these strains in host-microbe interactions. B. Imaging mass spectrometry of the mouse gut, comparing germ-free and gnotobiotic animals, allows putative bacterial metabolic exchange factors to be localized and identified chemically without labeling. Each false color image represents a given m/z value (CMR and PCD).