<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A process that involves the binding of an ion, usually Ca++, Na+ or Cl-, to a potassium channel. These interactions are involved in potassium ion transport, which establishes the electrochemical potential of the resting membrane.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>