(c-i) Representative immunohistochemistry results (out of six normal controls and six individuals with Crohn disease) from colonic mucosal tissue samples from normal controls for genotype AA (c) and GG (f) and individuals with Crohn disease for genotype AA (d) and GG (g) are shown to demonstrate the cellular localization of the ATG16L1 protein. Cellular expression patterns in mononuclear cells (h) and intestinal epithelial cells (i) of a Crohn disease sample (rs2241880AA) are shown at higher magnification. e shows a Crohn disease sample without the primary antibody, used as a control. Bar represents 10 μm in c-g. 