Anti-FFAR4 antibodies are used in the immunodetection of the protein free fatty acid receptor 4. In humans, the canonical protein has a reported length of 361 amino acid residues and a mass of 40.5 kDa. Its subcellular localization is in the lysosomes and cell membrane. Up to 2 different isoforms have been reported for this protein. A member of the G-protein coupled receptor 1 protein family, FFAR4 is known to be involved with brown fat cell differentiation and GPCR signaling pathways. Post-translational modifications have been described, including phosphorylation and glycosylation. Synonyms for this target antigen include G-protein coupled receptor 129, G-protein coupled receptor GT01, G-protein coupled receptor PGR4, Obesity, susceptibility to, on chromosome 10q, and G-protein coupled receptor 120. FFAR4 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Over 60 citations in the literature describe the use of FFAR4 antibodies in research. Western Blot is a widely used application for these antibodies. Immunofluorescence and Immunohistochemistry are also common applications.