HCN Potassium Channels (IMAGE) University of Basel Caption This photo shows a 3-D model of several HCN potassium channels arranged side by side. Credit Photo courtesy of University of Basel 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.