New Way to Make Reprogrammed Stem Cells (IMAGE) University of Pennsylvania School of Medicine Caption These are mouse iPSCs generated using the microRNA method pioneered by the Morrisey Lab. The green fluorescence reveals expression of the Oct4 gene, which is a marker of pluripotent stem cells. Credit Edward Morrisey, PhD; University of Pennsylvania 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.