Figure 9. Histological localization of green fluorescent protein (GFP) to the ileum at 4 h after gavage of 109 Escherichia coli-interleukin-22- (IL-22)-GFP) cells at 24 h after total body irradiation (TBI) in C57BL/6J mice. A: Cross section of ileum. B: Inset from A showing localization of E. coli-IL-22-GFP+ fusion protein to the epithelial surface of the ileum. White arrow: Epithelial break (absence of red actin staining); green arrows: bacteria in villi near macrophages.
