DNA Repair Video (VIDEO) University of California - Davis This video is under embargo. Please login to access this video. Caption This filament composed of a fluorescently-labeled DNA molecule and the repair protein Rad51 grows progressively brighter and longer as more and more Rad51 molecules assemble onto the DNA. The sphere on the left is an optical trap holding the DNA in place. Credit Stephen Kowalczykowski/UC Davis Usage Restrictions One-time usage rights to accompany story related to the University of California, Davis, news release. Must contain video credit. 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.