Predicted to enable NADH dehydrogenase (ubiquinone) activity. Predicted to be located in mitochondrial inner membrane. Predicted to be integral component of membrane. Is expressed in several structures, including adaxial cell; digestive system; lens; musculature system; and solid lens vesicle. Orthologous to human NDUFB4 (NADH:ubiquinone oxidoreductase subunit B4). [provided by Alliance of Genome Resources, Apr 2022]