NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5（NDUFA5) is a member of the complex I NDUFA5 subunit family. The human NDUFA5 gene codes for the B13 subunit of complex I of the respiratory chain that transfers electrons from NADH to ubiquinone. The NDUFA5 protein localizes to the inner mitochondrial membrane as part of the seven component-containing， water soluble ’iron-sulfur protein’（IP) fraction of complex I， even though its exact role is undetermined.
