Bowel of a Patient with Ulcerative Colitis, a Chronic Inflammatory Bowel Disease (image) Institute for Research in Biomedicine (IRB Barcelona) Share Print E-Mail Caption Bowel of a patient with ulcerative colitis, a chronic inflammatory bowel disease. In green: macrophage marker, in red: activated p38 protein, in blue: nucleus. Credit Author: Catrin Youssif, IRB Barcelona. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.