CD79A and inflammatory bowel disease: Anti-PAB antibodies were detected in patients with CD (IgG, 8.6%; IgA, 5.7%, and IgA or IgG 8.6%) and patients with UC (IgG, 8.6%; IgA, 2.9%, and IgA or IgG, 8.6%), but not in non-IBD DC and HC.