Almokalant is a class III antiarrhythmic drug, acts as a potassium channel blocker. And it inhibits a specific component (Ikr) of the time-dependent delayed rectifier K+ current.
Halofantrine hydrochloride is a blocker of delayed rectifier potassium current. Halofantrine hydrochloride also via the inhibition of the human-ether-a-go-go-related gene (HERG) channel and a potent antimalarial agent.
VU041 is an inhibitor of Anopheles gambiae and Aedes aegypti inward rectifier potassium 1 channels (IC50: 2.5 μM and 1.7 μM, respectively). VU041 inhibits appreciably is mammalian Kir2.1 (IC50: 12.7 μM) and has less inhibitory effect on mammalian Kir1.1, Kir4.1, Kir6.2 SUR1, and Kir7.1.
Guanosine 5’-diphosphate (GDP) is a purine nucleotide and biosynthetic precursor of guanosine 5’-triphosphate .1It has been used to study the conformations of GTPases.2GDP (100 μM) activates sulfonylurea receptor 2B (SUR2B) linked to the inward-rectifier potassium channel 6.1 (Kir6.1) in HEK293T cells in a patch-clamp assay.3 1.Berg, J.M., Tymoczko, J.L., and Stryer, L.Biochemistry(2002) 2.Vetter, I.R., and Wittinghofer, A.The guanine nucleotide-binding switch in three dimensionsScience294(5545)1299-1304(2001) 3.Yamada, M., Isomoto, S., Matsumoto, S., et al.Sulphonylurea receptor 2B and Kir6.1 form a sulphonylurea-sensitive but ATP-insensitive K+ channelJ. Physiol.499(Pt 3)715-720(1997)
Zacopride is a selective agonist of inward rectifier potassium current (I K1) channel, inhibiting ventricular arrhythmias without affecting atrial arrhythmias.
Ibutilide (U70226E free base) is a potent antiarrhythmic compound that extends the action potential duration. It effectively blocks the rapidly activating delayed rectifier potassium current (I Kr ) in AT-1 cells [1].
Chlorahololide C is a potent and selective potassium channel blocker, it exerts potent and selective inhibition on the delayed rectifier (I(K)) K(+) current with the IC(50) value of 3.6 + - 10.1 mu M.