Ready-to-use ELISA kits are available for the detection of VPV2R, an alias of the protein, arginine vasopressin receptor 2. The official gene symbol is AVPR2. The protein, with a mass of 40.3 kDa and length of 371 residues, is reported to be membrane-associated. It is a member of the G-protein coupled receptor 1 family, Vasopressin/oxytocin receptor subfamily and may be known by other names, including: DIR3, DIR, renal-type arginine vasopressin receptor, antidiuretic hormone receptor, AVPR V2, and vasopressin V2 receptor, and V2R.