Anti-coenzyme Q4 homolog antibodies enable researchers to detect and measure the coenzyme Q4 homolog antigen in biological samples. This target is a reported synonym of the COQ4 gene, which encodes coenzyme Q4. This protein is a known component of the coenzyme Q biosynthetic pathway. The human version of coenzyme Q4 homolog has a canonical amino acid length of 265 residues and a protein mass of 29.7 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the mitochondria of cells and widely expressed in many tissue types. coenzyme Q4 homolog is a member of the COQ4 protein family.