MODY 2 or GCK-MODY is a form of maturity-onset diabetes of the young. It is due to any of several mutations in the GCK gene on human chromosome 7 for glucokinase. Glucokinase serves as the glucose sensor for the pancreatic beta cell. Normal glucokinase triggers insulin secretion as the glucose exceeds about 90 mg/dl (5 mM). These...