KCNJ11 (Potassium Inwardly Rectifying Channel Subfamily J Member 11): KCNJ11 is a gene that encodes a protein component of the ATP-sensitive potassium (KATP) channel found in pancreatic beta cells. These channels play a crucial role in regulating insulin secretion and maintaining glucose balance. Variations in KCNJ11 are associated with a higher risk of developing type 2 diabetes.