illustration (IMAGE) UT Southwestern Medical Center Caption At left is a healthy islet with many insulin-producing cells (green) and few glucagon-producing cells (red). At right, this situation is altered in a diabetic islet with a heavy preponderance of glucagon-producing cells (red) and very few insulin-producing cells (green Credit UT Southwestern Medical Center 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.