Anti-CYP2S1 antibodies are used in the immunodetection of the protein cytochrome P450 family 2 subfamily S member 1. In humans, the canonical protein has a reported length of 504 amino acid residues and a mass of 55.8 kDa. Its subcellular localization is in the ER. Up to 2 different isoforms have been reported for this protein. It is noted to be expressed at higher levels in extrahepatic tissues including trachea, lung, stomach, small intestine, colon, kidney, breast, placenta and spleen. A member of the Cytochrome P450 protein family, CYP2S1 is a cytochrome P450 monooxygenase involved in the metabolism of retinoids and eicosanoids. Synonyms for this target antigen include cytochrome P450 2S1, cytochrome P450, family 2, subfamily S, polypeptide 1, cytochrome P540, subfamily IIS, polypeptide 1, hydroperoxy icosatetraenoate dehydratase, thromboxane-A synthase, and CYPIIS1. Some CYP2S1 antibodies may have been used in research and have associated citations. ELISA, Western Blot, Immunocytochemistry, Immunofluorescence, and Immunohistochemistry are common applications for these antibodies.