Anti-OPN5 antibodies are used in the immunodetection of the protein opsin 5. In humans, the canonical protein has a reported length of 354 amino acid residues and a mass of 39.7 kDa. Its subcellular localization is in the cell membrane. It is notably expressed in the brain and retina and cell lines derived from neural retina. A member of the G-protein coupled receptor 1 protein family, OPN5 is known to be involved with GPCR signaling pathways. Post-translational modifications have been described, including palmitoylation and glycosylation. Synonyms for this target antigen include neuropsin, transmembrane protein 13, and G-protein coupled receptor 136. OPN5 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. A number of OPN5 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.