Anti-IRTA4 antibodies enable researchers to detect and measure the IRTA4 antigen in biological samples. This target is a reported synonym of the FCRL2 gene, which encodes Fc receptor like 2. This protein is known to function in receptor-mediated signaling pathways and cell to cell signaling, among other biological roles. The human version of IRTA4 has a canonical amino acid length of 508 residues and a protein mass of 55.5 kilodaltons, although 5 isoforms have been identified. It is reported to be localized in the cell membrane of cells.