Anti-SPATA31A3 antibodies are used in the immunodetection of the protein SPATA31 subfamily A member 3. In humans, the canonical protein has a reported length of 1347 amino acid residues and a mass of 148.7 kDa. Its subcellular localization is in the membrane. A member of the SPATA31 protein family, SPATA31A3 is believed to play a role in spermatogenesis. Synonyms for this target antigen include family with sequence similarity 75, member A3, protein FAM75A3, and spermatogenesis-associated protein 31A3.