Photocleavable Proteins at Work (VIDEO) University of Alberta 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 light-activated control of protein localization in mammalian cells. The protein is initially in the cytoplasm and excluded from the nucleus of the cell (blue area in the middle each cell). Upon illumination, the part of the protein that prevents it from entering the nucleus is cleaved off and the protein is now able to enter the nucleus. The concentration of protein is represented by the color, with blue indicating a low concentration, and red representing a high concentration. Credit Robert Campbell Usage Restrictions With credit to Robert Campbell, Faculty of Science, University of Alberta 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.