Ready-to-use ELISA kits are available for the detection of Selenoprotein W, 1, an alias of the protein, selenoprotein W. The official gene symbol is SELENOW. The protein, with a mass of 9.4 kDa and length of 87 residues, is reported to be cytoplasmic. It is a member of the SelWTH family, Selenoprotein W subfamily and may be known by other names, including: selW, SEPW1, and selenoprotein W 1.