Cell trains photoactivated by blue light. (VIDEO) Institute for Bioengineering of Catalonia (IBEC) This video is under embargo. Please login to access this video. Caption 0:00 / 0:03 Cell trains photoactivated by blue light. Credit Institute for Bioengineering of Catalonia (IBEC) Usage Restrictions Give credit License Original 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.