KCNJ11 (Potassium Inwardly Rectifying Channel Subfamily J Member 11): KCNJ11 is a gene that encodes a protein forming part of the ATP-sensitive potassium (KATP) channel in pancreatic beta cells. These channels are essential for regulating insulin secretion and maintaining glucose homeostasis. Variations in KCNJ11 are linked to an increased risk of type 2 diabetes.