Generation of Luminopsin (IMAGE) Emory Health Sciences Caption Gaussia luciferase (Gluc) is fused to the ChR protein. ChR can be activated by blue light or by light emitted by Gluc when binding to its substrate coelenterazine (CTZ). YFP = yellow fluorescent protein. Credit Shan Ping Yu Usage Restrictions To be used in connection with <em>Journal of Neuroscience</em> paper 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.