Anti-BKS antibodies enable researchers to detect and measure the BKS antigen in biological samples. This target is a reported synonym of the STAP2 gene, which encodes signal transducing adaptor family member 2. The human version of BKS has a canonical amino acid length of 403 residues and a protein mass of 44.9 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cytoplasm of cells and widely expressed in many tissue types.