Tholos (IMAGE) National Institutes of Natural Sciences Caption The two functionally unannotated archaeal proteins, PbaA and PF0014, are co-assembled into a unique ancient Greek tholos-like architecture, having a spacious space in the middle surrounded by two pentameric PbaA, a chaperone-like protein, and five columns of dimeric PF0014. Credit © Biomolecular Organization Research Group 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.