Anti-S863-3 antibodies enable researchers to detect and measure the S863-3 antigen in biological samples. This target is a reported synonym of the C1orf43 gene, which encodes chromosome 1 open reading frame 43. This protein is known to function in in utero embryonic development, among other biological roles. The human version of S863-3 has a canonical amino acid length of 253 residues and a protein mass of 28.8 kilodaltons, although 5 isoforms have been identified. It is reported to be localized in the mitochondria, Golgi, and membrane of cells and widely expressed in many tissue types.