Ready-to-use ELISA kits are available for the detection of Orexin Receptor 2, an alias of the protein, hypocretin receptor 2. The official gene symbol is HCRTR2. The protein, with a mass of 50.7 kDa and length of 444 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: OX2R, ox2-R, orexin type-2 receptor, hypocretin receptor type 2, hypocretin (orexin) receptor 2, and orexin receptor type 2.