Computer Simulation of the Nak Channel (IMAGE) Forschungsverbund Berlin Caption Snapshot taken during the computer simulation of the NaK channel -- This channel (shown in yellow and orange) enables the flow of ions (e.g. potassium ions [red spheres]) across the cell membrane. (The membrane lipids are depicted in gray.) Credit Barth van Rossum / FMP Usage Restrictions The image may only be used with appropriate caption or credit. 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.