Mitotic Spindle Cut With Laser (VIDEO) Harvard 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 pulse from the femtosecond laser slices through the mitotic spindle, causing the damaged microtubules to depolymerize. Meanwhile, undamaged and newly nucleated microtubules continue growing and soon fill the gap. Credit Jan Brugués, Harvard School of Engineering and Applied Sciences. 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.