Adenosine A2A Receptor (IMAGE) Moscow Institute of Physics and Technology Caption The final structure of the adenosine A2A receptor was examined in the study. The yellow spheres are sulfur atoms, the blue spheres are water molecules, and the blue lines represent the lipid membrane. Credit MIPT Press office Usage Restrictions None 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.