Protein Setup (IMAGE) Duke University Caption To better understand the structure and stability of Protein S, researchers slowly pulled it apart. The red protein is Protein S and the blue proteins are used as "ties" for each end of the protein. Credit Duke University 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.