Immunofluorescence insulinoma (IMAGE) Universitat Pompeu Fabra - Barcelona Caption Close-up of insulinoma cells expressing insulin (red). Credit Pompeu Fabra University (UPF) 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.