Fig. (IMAGE) Osaka University Caption Naked A. simplex and A. simplex coated with hydrogel sheath containing fluorescence dye. Credit Shinji Sakai Usage Restrictions Credit must be given to the creator. License Original 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.