Anti-RAP2B antibodies are used in the immunodetection of the protein RAP2B, member of RAS oncogene family. In humans, the canonical protein has a reported length of 183 amino acid residues and a mass of 20.5 kDa. Its subcellular localization is in the endosome. It is reported to be expressed in red blood cells. A member of the Ras protein family, RAP2B is reported to be a small GTP-binding protein which cycles between a GDP-bound inactive and a GTP-bound active form. Post-translational modifications have been described, including palmitoylation. Synonyms for this target antigen include ras-related protein Rap-2b and small GTP binding protein. RAP2B gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Some RAP2B antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.