Anti-flavin containing dimethylaniline monoxygenase 3 antibodies are used for the immunodetection of the protein encoded by the FMO3 gene. In humans, the canonical protein has a reported length of 532 amino acid residues and a mass of 60 kDa. Its subcellular localization is in the ER. It is notably expressed in the liver. A member of the FMO protein family, it is known to be an important hepatic enzyme that catalyzes the oxygenation of a wide variety of nitrogen- and sulfur-containing compounds including drugs as well as dietary compounds. The gene encoding this protein is implicated in Trimethylaminuria. Other names for this target antigen include TMAU, dJ127D3.1, flavin-containing monooxygenase 3, FMO form 2, dimethylaniline monooxygenase [N-oxide-forming] 3, and FMOII. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species.