Anti-COQ11 antibodies enable researchers to detect and measure the COQ11 antigen in biological samples. This target is a reported synonym of the NDUFA9 gene, which encodes NADH:ubiquinone oxidoreductase subunit A9. This protein is known to function in the transport of ions, among other biological roles. The human version of COQ11 has a canonical amino acid length of 377 residues and a protein mass of 42.5 kilodaltons. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. COQ11 is a member of the Complex I NDUFA9 subunit protein family.