Validating Stem Cell Lineage (VIDEO) Drexel University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption A software program developed by engineers at Drexel University, called Lineage Editing and Validation (LEVER), allows biologists to tag and track cell proliferation to validate lineage trees. Credit Drexel University 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.