Abstract
The mitochondrial transmembrane protein NAD(P)+ transhydrogenase (NNT) catalyzes the transfer of a hydride between NAD(H) and NADP(H), coupled with the transport of a proton between the intermembrane space and the mitochondrial matrix. This process can occur in the direction of generation of NADPH or NADH (i.e., direct and reverse reactions). The NADPH generated by NNT activity stands out…