Carnitine palmitoyltransferase IICarnitine O-palmitoyltransferase 2, mitochondrial is an enzyme that in humans is encoded by the CPT2 gene.FunctionCarnitine palmitoyltransferase II precursor is a mitochondrial membrane protein which is transported to the mitochondrial inner membrane. CPT2 together with carnitine palmitoyltransferase I oxidizes long-chain fatty acids in the mitochondria. Defects in this gene are associated with mitochondrial long-chain fatty-acid oxidation disorders and carnitine palmitoyltransferase II deficiency.