Anti-hg99 antibodies enable researchers to detect and measure the hg99 antigen in biological samples. This target is a reported synonym of the OR1K1 gene, which encodes olfactory receptor family 1 subfamily K member 1. The human version of hg99 has a canonical amino acid length of 316 residues and a protein mass of 34.3 kilodaltons. It is reported to be localized in the cell membrane of cells. hg99 is a member of the G-protein coupled receptor 1 protein family.