A voltage-gated potassium channel alpha subunit with PAS domain that contains the PRINTS signature ELKCHANNEL (PRINTS:PR01465) consisting of a 6-element fingerprint. Includes the products of the mammalian KCNH3, KCNH4 and KCNH8 genes. [ PRO:CNA http://www.bioinf.manchester.ac.uk/cgi-bin/dbbrowser/sprint/searchprintss.cgi?display_opts=Prints&category=None&queryform=false&regexpr=off&prints_accn=PR01465 ]