Figure1. (IMAGE) Kanazawa University Caption Schematical illustration of the pore domain of a tetrameric cation channel, with the selectivity filter (SF) located between two transmembrane helices (Outer and Inner helix). Credit 2023 Irie, et al. Usage Restrictions Credit must be given to the creator. License CC BY 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.