The gene network analysis revealed numerous regulatoryconnections to CPT1 (carnitine palmitoyltransferase 1) fromthe genetic markers specific to both PD and VP (Fig. 7b).CPT1 is a transporter protein located on the outer mitochondrialmembrane; CPT1 exists in three isoforms in mammaliancells: CPT1A, CPT1B, and CPT1C. The gene discussed is CPT1B; the disease is Parkinson disease.