Cellular Alchemy (IMAGE) University of Pennsylvania School of Medicine Caption Insulin-expressing cells (red) are shown arising within the intestinal crypts (green) of a mouse that received three beta-cell "reprogramming factors." Credit Ben Stanger, M.D., Ph.D., Perelman School of Medicine 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.