Anti-Sos antibodies enable researchers to detect and measure the Sos antigen in biological samples. This target is a reported synonym of the XYLT2 gene, which encodes xylosyltransferase 2. This protein is known to function in metabolic processes, among other biological roles. The human version of Sos has a canonical amino acid length of 865 residues and a protein mass of 96.8 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the Golgi and is secreted of cells. Sos is a member of the Glycosyltransferase 14 protein family.