Microtubule Contractility (2 of 2) (VIDEO) University of Pennsylvania School of Medicine 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 Microtubules in a cardiomyocyte. Credit The lab of Ben Prosser, Ph.D., Perelman School of Medicine, University of Pennsylvania, Science 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.