Stacked Interaction Domains (image) Washington University in St. Louis Share Print E-Mail Caption The double-sided interaction domain may allow multi-protein chains to form. In Korasick's crystal, five of the ARF7 PB1 domains stuck to one another, forming a pentamer. "It was really beautiful to look at in the software, because you could actually see its spirals and turns," said Korasick. Credit Strader, Jez et al. Usage Restrictions please credit Share Print E-Mail 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.