Fig. 1 (IMAGE) Kanazawa University Caption Structural diagrams of P and M forms of helical metallocryptand (R6)-LNi3, which has a binding site for metal ions. The P/M inversion rate greatly depends on the metal ions, Credit Ikbal, et al., Sci. Adv. 9, eadj5536 (2023). Usage Restrictions The image may only be used with appropriate caption and credit. 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.