SLC2A1-GLUT1 deficiency (13)ECHS1-mitochondrial short-chain enoyl-CoA hydratase 1 deficiency (114)HIBCH-3-hydroxyisobutyryl-CoA hydrolase deficiency (136)Pyruvate dehydrogenase complex deficiency (58–61). The gene discussed is SLC2A1; the disease is hyperinsulinemic hypoglycemia, familial, 4.