Pancreatic beta cell (IMAGE) Université de Genève Caption Pancreatic beta cell under electronic microscopy. The white circles visible in the centre of the cell correspond to fat storage droplets. Credit (© UNIGE - laboratoire Maechler) Usage Restrictions None License Original 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.