Artwork Depicting the Model (IMAGE) BIOSS - Centre for Biological Signalling Studies Caption Artwork by the daughter of one of the scientists, depicting the model: Cholesterol (green) can bind to a T cell receptor in an inactive state (blue). When an antigen (orange) binds to the receptor in an active conformation (red), the T cell is activated (below). Credit Susana Minguet/BIOSS Usage Restrictions This image may only be used with the appropriate caption and credit. 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.