Multiple malignant tumors are characterized by the significant overexpression of FAO enzymes Carnitine Palmitoyltransferase 1A (CPT1A), Carnitine Palmitoyltransferase 1B (CPT1B), and Carnitine Palmitoyltransferase-2 (CPT2) (29, 30). The gene discussed is CPT1B; the disease is cancer.