<Li> Episodic ataxia (EA), characterized by sporadic bouts of severe discoordination with or without myokymia, and can be provoked by stress, startle, or heavy exertion such as exercise . </Li> <Li> Familial hemiplegic migraine (FHM) </Li> <Li> Spinocerebellar ataxia type 13 </Li> <Li> Long QT syndrome is a ventricular arrhythmia syndrome caused by mutations in one or more of presently ten different genes, most of which are potassium channels and all of which affect cardiac repolarization . </Li>

What type of macromolecule are ion channels made of