New Protein Structures (IMAGE) University of Bath Caption A variety of large αS structures are formed upon incubation with phospholipids. Four subtypes with varying degrees of helicity were observed, named ribbons, waves, helices and compact helices. Credit Jody Mason and Richard Meade 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.