KCNJ5 (potassium channel, inwardly rectifying subfamily J, member 5) is an inward rectifier K+ channel 4, which is activated by G-protein. This protein is also called Kir3.4, and is expressed in zona glomerulosa, and forms either homotetramers or heterotetramers with Kir3.1 (KCNJ3), Kir3.2 (KCNJ6)...