Anti-ARP4 antibodies enable researchers to detect and measure the ARP4 antigen in biological samples. This target is a reported synonym of the ANGPTL4 gene, which encodes angiopoietin like 4. This protein is known to function in angiogenesis and the apoptotic pathway, among other biological roles. The human version of ARP4 has a canonical amino acid length of 406 residues and a protein mass of 45.2 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the extracellular matrix and is secreted of cells.