Anti-ARPC1B antibodies are used in the immunodetection of the protein actin related protein 2/3 complex subunit 1B. In humans, the canonical protein has a reported length of 372 amino acid residues and a mass of 41 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is notably expressed in the spleen, skin, lymph node, bone marrow, and appendix. A member of the WD repeat ARPC1 protein family, ARPC1B is a known component of the Arp2/3 complex, a multiprotein complex that mediates actin polymerization upon stimulation by nucleation-promoting factor (NPF). Synonyms for this target antigen include IMD71, PLTEID, p40-ARC, p41-ARC, actin-related protein 2/3 complex subunit 1B, and ARC41. ARPC1B gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of ARPC1B antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.