Interestingly, Andersen-Tawil syndrome, also known as long QT-syndrome 7, is a rare autosomal dominant genetic disorder produced by mutations in gene codifying the potassium channel subunit Kir2.1 (an important component of the sour taste transducing pathway). Here, KCNJ2 is linked to Cardiodysrhythmic potassium-sensitive periodic paralysis.