Cells in Vivo (image) University of California - Berkeley Share Print E-Mail Caption The newly reprogrammed muscle cells, shown here emitting green fluorescence, were injected into mice and successfully fused to make new muscle fibers and repair damaged tissue. Credit Image by Preeti Paliwal, UC Berkeley Usage Restrictions Non-commercial use allowed with image credit. 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.