Stem Cells Suitable for Clinical Therapy (IMAGE) University of Edinburgh Caption A microscope image showing one of 25 embryonic stem cell lines investigated. The green staining shows the expression of NANOG, a marker of self-renewal in stem cells. All 25 cell lines are suitable to develop regenerative medicine therapies. Credit Dr. Maurice Canham, University of Edinburgh. 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.