Changing Cells (IMAGE) Brown University Caption In figures from the study, stem cells are in the process of becoming the precursors of bodily tissues -- different colors will become different tissues. Figure D represents cells grown on the new synthetic bed, while H depicts cells grown on a traditional bed of mouse fibroblasts. Credit Hoffman-Kim, <i>et. al</i>. Usage Restrictions with 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.