UCP3 and diabetes mellitus: The association between the UCPs genes and diabetes has been investigated by many studies, and the most often studied SNPs are the rs1800592 (−3826A/G) of the UCP1 gene, the rs659366 (−866G/A), rs660339 (Ala55Val), and Ins/Del of the UCP2 gene, and the rs1800849 (−55C/T) of the UCP3 gene [19, 20].