Anti-FCRL4 antibodies are used in the immunodetection of the protein Fc receptor like 4. In humans, the canonical protein has a reported length of 515 amino acid residues and a mass of 57.2 kDa. Its subcellular localization is in the cell membrane. Up to 2 different isoforms have been reported for this protein. It is notably expressed in the tonsil, lymph node, and appendix. FCRL4 is believed to function as a an inhibitor of the B-cell receptor signaling. Post-translational modifications have been described, including phosphorylation and glycosylation. Synonyms for this target antigen include IFGP family protein 2, fc receptor homolog 4, fcR-like protein 4, hIFGP2, immune receptor translocation-associated protein 1, and Fc receptor-like protein 4. FCRL4 gene orthologs have been reported in the mouse, bovine and chimpanzee species. Over 60 citations in the literature describe the use of FCRL4 antibodies in research. Flow Cytometry and Western Blot are common applications for these antibodies.