Enables carnitine O-palmitoyltransferase activity and identical protein binding activity. Involved in several processes, including fatty acid metabolic process; liver regeneration; and response to tetrachloromethane. Located in mitochondrial outer membrane. Is integral component of mitochondrial outer membrane. Biomarker of alcoholic hepatitis; obesity; and type 2 diabetes mellitus. Human ortholog(s) of this gene implicated in carnitine palmitoyltransferase I deficiency and lipid metabolism disorder. Orthologous to human CPT1A (carnitine palmitoyltransferase 1A). [provided by Alliance of Genome Resources, Apr 2022]