Arginine vasopressin receptor 1A (officially called AVPR1A) is one of the three major receptor types for arginine vasopressin (AVPR1B and AVPR2 being the others), and is present throughout the brain, as well as in the periphery in the liver, kidney, and vasculature. Arginine vasopressin receptor 1A is also known as: * V1a vasopressin receptor * antidiuretic hormone receptor 1A * SCCL vasopressin subtype 1a receptor * V1-vascular vasopressin receptor AVPR1A * vascular/hepatic-type arginine vasopressin receptor