Anti-QRFP antibodies are used in the immunodetection of the protein pyroglutamylated RFamide peptide. In humans, the canonical protein has a reported length of 136 amino acid residues and a mass of 14.9 kDa. It has been described to be a secreted protein. It is reported to be widely expressed in the brain with highest expression levels in the cerebellum, medulla, pituitary, retina, vestibular nucleus, and white matter. It is a member of the RFamide neuropeptide protein family. Synonyms for this target antigen include P518 precursor protein, RF(Arg-Phe)amide family 26 amino acid peptide (P518), prepro-26RFa, prepro-QRFP, and orexigenic neuropeptide QRFP. QRFP gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Immunofluorescence is the most common application for the QRFP antibodies listed below. Immunocytochemistry and Immunohistochemistry are also common applications.