Phosphoenolpyruvate Carboxykinase Deficiency, Mitochondrial, also known as pepck2 deficiency, is related to phosphoenolpyruvate carboxykinase deficiency, cytosolic and phosphoenolpyruvate carboxykinase deficiency. An important gene associated with Phosphoenolpyruvate Carboxykinase Deficiency, Mitochondrial is PCK2 (Phosphoenolpyruvate Carboxykinase 2, Mitochondrial). Affiliated tissues include liver.