Anti-MTARC1 antibodies are used in the immunodetection of the protein mitochondrial amidoxime reducing component 1. In humans, the canonical protein has a reported length of 337 amino acid residues and a mass of 37.5 kDa. Its subcellular localization is in the mitochondria. Up to 3 different isoforms have been reported for this protein. It is notably expressed in many tissues, such as the appendix and duodenum. MTARC1 is known to catalyze the reduction of N-oxygenated molecules, acting as a counterpart of cytochrome P450 and flavin-containing monooxygenases in metabolic cycles. Synonyms for this target antigen include MOSC domain-containing protein 1, mitochondrial, moco sulfurase C-terminal domain-containing protein 1, molybdenum cofactor sulfurase C-terminal domain-containing protein 1, and MOCO sulphurase C-terminal domain containing 1. MTARC1 gene orthologs have been reported in the mouse, rat, bovine, chimpanzee and chicken species.