(VIDEO) Center for Genomic Regulation 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 This video shows the dynamics of dorsal closure in an embryo expressing the caspase marker Apoliner5. At the onset of the process, the GFP fluorescent signal is transferred from the cytoplasm to the nucleus indicating the activation of caspases and apoptosis. At that moment cells will start to shrink and to pull on the epidermis. The process takes approximately 2h30min. Credit Laure Saias, CRG Usage Restrictions Creative Commons 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.