Ready-to-use ELISA kits are available for the detection of Gpcr19-rs1, an alias of the protein, luteinizing hormone/choriogonadotropin receptor. The official gene symbol is LHCGR. The protein, with a mass of 78.6 kDa and length of 699 residues, is reported to be membrane-associated. It is a member of the G-protein coupled receptor 1 family, FSH/LSH/TSH subfamily and may be known by other names, including: LH/CG-R, LGR2, HHG, lutropin/choriogonadotropin receptor, hypergonadotropic hypogonadism, and lutropin-choriogonadotropic hormone receptor, and LHR.