Ready-to-use ELISA kits are available for the detection of GPR125, an alias of the protein, adhesion G protein-coupled receptor A3. The official gene symbol is ADGRA3. The protein, with a mass of 146.2 kDa and length of 1321 residues, is reported to be membrane-associated. It is a member of the G-protein coupled receptor 2 family, Adhesion G-protein coupled receptor (ADGR) subfamily and may be known by other names, including: PGR21, GPR125, probable G-protein coupled receptor 125, and G-protein coupled receptor 125.