ITGAE [αE] and CD3ε gene expression is higher in the ileum than colon. [a–b] αE and CD3ε gene expression were measured in ileal and colonic biopsies from healthy control subjects and IBD patients. Gene expression was normalized to TMEM55B. Lines and error bars show the mean ± SD. [c–d] Paired biopsies were taken from inflamed and uninflamed areas of the ileum and colon of IBD patients and evaluated for αE and CD3ε gene expression relative to TMEM55B. CD, Crohn’s disease; IBD, inflammatory bowel disease; SD, standard deviation; UC, ulcerative colitis.