Pseudo-Islets Made up of Human Alpha Cells (image) Université de Genève Share Print E-Mail Caption Pseudo-islets made up of human alpha cells. These cells produce glucagon (blue), but can «learn» to make insulin (red). The GFP protein (green) allows tracing the origin of the cells, thus certifying their change of identity. Credit © Pedro Herrera , UNIGE Usage Restrictions None Share Print E-Mail 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.