Hepatic Carnitine Palmitoyltransferase (CPT) System: Gateway to Fatty Acid Oxidation Long chain fatty acids cannot directly cross the inner mitochondrial membrane. The hepatic carnitine shuttle system, led by CPT I and Dysfunction of the carnitine cycle in tumor progression: Heliyon Rethinking the regulation of l carnitine transport in skeletal muscle cells. Focus on "Multiple AMPK activators inhibit l carnitine uptake in C2C12 skeletal muscle myotubes". Semantic Scholar Role of Carnitine Shuttle System in the Active Transport of Fatty Acyl Coa into the mitochondrial Translating the basic knowledge of mitochondrial functions to metabolic therapy: role of L carnitine Translational Research