Anti-La ribonucleoprotein 4B antibodies are used for the immunodetection of the protein encoded by the LARP4B gene. In humans, the canonical protein has a reported length of 738 amino acid residues and a mass of 80.6 kDa. Its subcellular localization is in the cytoplasm. Other names for this target antigen include LARP5, la-related protein 4B, La ribonucleoprotein domain family member 4B, La ribonucleoprotein domain family, member 5, la-related protein 5, and KIAA0217. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.