Anti-Fc receptor like 4 antibodies are used for the immunodetection of the protein encoded by the FCRL4 gene. 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. Alternative splicing is reported to yield 2 different isoforms for this protein. It is believed to function as a an inhibitor of the B-cell receptor signaling. Post-translational modifications have been described, including phosphorylation and glycosylation. Other names 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. Gene orthologs have been identified in the mouse, bovine and chimpanzee species. Over 60 citations in the literature describe the use of Fc receptor like 4 antibodies in research. Flow Cytometry and Western Blot are common applications for these antibodies.