Fig. 1 (IMAGE) Osaka University Caption Three dimensional density map and atomic model of the native supercoiled flagellar hook revealed by cryoEM image analysis. Left: side view; right: a central section. Credit Osaka 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.