Biopsies from healthy individuals, from patients with quiescent and active ulcerative colitis and patients with quiescent and active Crohn’s disease were taken from non-inflamed and inflamed regions to determine the expression level of CD98 heavy chain (CD98hc/SLC3A2) and CD98 light chain (CD98lc/SLC7A5). The gene discussed is SLC3A2; the disease is Crohn disease.