KCNJ3 (Potassium Voltage-Gated Channel Subfamily J Member 3): KCNJ3, also known as GIRK1 (G protein-activated inwardly rectifying potassium channel 1), is involved in regulating neuronal excitability and heart rate. By controlling potassium ion flow, KCNJ3 contributes to the stabilization of the resting membrane potential and the modulation of action potential in neurons and cardiac muscle cells. Dysregulation of KCNJ3 has been implicated in neurological disorders, such as epilepsy and mood disorders, and cardiovascular diseases, highlighting its role in maintaining electrical stability in the brain and heart....