Predicted to enable NADH dehydrogenase activity. Predicted to be involved in circadian rhythm; mitochondrial respiratory chain complex I assembly; and ubiquinone-6 biosynthetic process. Located in mitochondrial inner membrane. Part of mitochondrial respiratory chain complex I. Is expressed in several structures, including alimentary system; central nervous system; egg cylinder; genitourinary system; and integumental system. Human ortholog(s) of this gene implicated in nuclear type mitochondrial complex I deficiency 26. Orthologous to human NDUFA9 (NADH:ubiquinone oxidoreductase subunit A9). [provided by Alliance of Genome Resources, Apr 2022]