Anti-OR40 antibodies enable researchers to detect and measure the OR40 antigen in biological samples. This target is a reported synonym of the OR3A1 gene, which encodes olfactory receptor family 3 subfamily A member 1. This protein is known to function in signal transduction pathways, among other biological roles. The human version of OR40 has a canonical amino acid length of 315 residues and a protein mass of 34.6 kilodaltons. It is reported to be localized in the cell membrane of cells. Other names for this target antigen include OLFRA03, OR17-40, and OR17-82.