BAX and hyperinsulinemic hypoglycemia, familial, 4: In addition, ATP deficiency induces the expression of B-cell lymphoma 2 (Bcl-2), Bcl-2-like protein 4 (Bax), and Bcl-2-related cell death agonist protein (Bad) in the mitochondrial membrane, leading to mitochondrial swelling, and mitochondrial fission.