Anti-Lpr4 antibodies enable researchers to detect and measure the Lpr4 antigen in biological samples. This target is a reported synonym of the PLPPR4 gene, which encodes phospholipid phosphatase related 4. This protein is known to function in neuronal development and GPCR signaling pathways, among other biological roles. The human version of Lpr4 has a canonical amino acid length of 763 residues and a protein mass of 83 kilodaltons, although 3 isoforms have been identified. Lpr4 is a member of the PA-phosphatase related phosphoesterase protein family.