Spindle Elongation (VIDEO) Ruđer Bošković Institute This video is under embargo. Please login to access this video. Caption Spindle elongation depends on the joint activity of the motor EG5/kinesin-5 and the microtubule crosslinker PRC1. Without them, elongation is completely blocked, which is visible from this movie with chromosomes stained by SiR-DNA and color-coded for depth. Credit Toli? Lab 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.