Shiny PKAchu Mice and Retina Cells (VIDEO) Kyoto University 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 These two mice are seemingly the same, but under blue light, one mouse glows green. This green mouse is a transgenic PKAchu mouse that changes color when the protein PKA is activated. Taking a sheet of retinal cells from PKAchu, you can see that PKA is activated by darkness only in the stimulated area Credit Kyoto University/Matsuda Lab Usage Restrictions Credit accordingly 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.