?
NADH:Ubiquinone oxioreductase, 42 kDa (NDUO42) is a family of proteins that are highly similar to deoxyribonucleoside kinases (dNK). Members of this family have been identified as one of the subunits of NADH:Ubiquinone oxioreductase (complex I), a multi-protein complex located in the inner mitochondrial membrane. The main function of the complex is to transport electrons from NADH to ubiquinone, which is accompanied by the translocation of protons from the mitochondrial matrix to the inter membrane space.