However, several mutations in KCNQ1 leading to a “long QT syndrome” of cardiac arrhythmias (Y111C, L114P, and P117L) or Benign Familial Neonatal Seizures (R353G and L339R) mutations in KCNQ2 reduced channel expression via effects on trafficking of the channels [4,42,43]. The gene discussed is KCNQ1; the disease is Benign familial neonatal seizures.