Dimmable (IMAGE) University of Bonn Caption The GPI-EGFP dye emits light when irradiated. If the dark quencher D3 reaches the outside of the membrane, it shields the nano lamp - it becomes darker. Credit (c) AG Mody / IEECR, Universität Bonn Usage Restrictions This image may be used together with the press release. 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.