Gut Repair Glands (IMAGE) Washington University School of Medicine Caption Scientists have identified a protein that is critical to repairing glands in the intestine’s inner lining. The glands appear as dark green spots above and are rebuilt every two to four weeks as the inner lining of the gut is continually renewed. Credit Hiroyuki Miyoshi Usage Restrictions None License Licensed content 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.