Enables the transmembrane transfer of a potassium ion by a delayed rectifying voltage-gated channel. A delayed rectifying current-voltage relation is one where channel activation kinetics are time-dependent, and inactivation is slow.
voltage-gated potassium channel activity involved in SA node cell action potential depolarization
Synonyms
Xrefs:
reactome:R-HSA-5577050 "AKAP9:KCNQ1 tetramer:KCNE dimer transports K+ from cytosol to extracellular region"
;
reactome:R-HSA-5577237 "KCNH2:KCNE transport K+ from cytosol to extracellular region"