Synapsis During Meiosis (VIDEO) University of California - Berkeley 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 Chromosome motion can be directly observed by microscopic imaging of worms expressing fluorescent fusion proteins. Here, chromosome attachment sites at the nuclear envelope are marked by green fluorescent protein (GFP), while the chromosomes themselves are labeled with a red fluorescent protein. The movement is very obvious in the cells on the right side of this frame, which are actively pairing and synapsing their chromosomes, while the motion has slowed in the later-stage cells to the left, which have completed pairing and synapsis. Credit Abby Dernburg, UC Berkeley 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.