Anti-SSR4 antibodies are used in the immunodetection of the protein signal sequence receptor subunit 4. In humans, the canonical protein has a reported length of 173 amino acid residues and a mass of 19 kDa. Its subcellular localization is in the ER. It is notably widely expressed in many tissue types. It is a member of the TRAP-delta protein family. The SSR4 marker can be used to identify Plasma Cells.* Synonyms for this target antigen include TRAPD, translocon-associated protein subunit delta, SSR-delta, TRAP-delta, signal sequence receptor, delta, and CDG1Y. SSR4 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish and chimpanzee species.
*HuBMAP Human Reference Atlas v1.4