Ready-to-use ELISA kits are available for the detection of GPR66, an alias of the protein, neuromedin U receptor 1. The official gene symbol is NMUR1. The protein, with a mass of 47.4 kDa and length of 426 residues, is reported to be membrane-associated. It is a member of the G-protein coupled receptor 1 family and may be known by other names, including: GPC-R, FM3, (FM-3), NMU-R1, G-protein coupled receptor FM-3, and G-protein coupled receptor 66, and NMU1R.