Reprogrammed Progenitor Cells (IMAGE) University of California - Berkeley Caption UC Berkeley researchers created newly reprogrammed muscle progenitor cells, shown here emitting green fluorescence, by rewinding the clock on mature muscle fiber. Credit Image by Preeti Paliwal, UC Berkeley Usage Restrictions Non-commercial use allowed with image credit. 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.