Ready-to-use ELISA kits are available for the detection of zag1, an alias of the protein, alpha-2-glycoprotein 1, zinc-binding. The official gene symbol is AZGP1. The kits can detect several species variants of the protein, including: human, mouse, rat, and bovine. The protein, with a mass of 34.3 kDa and length of 298 residues, is reported to be secreted. It is a member of the MHC class I family and may be known by other names, including: ZA2G, zn-alpha-2-glycoprotein, testicular tissue protein Li 227, Zn-alpha2-glycoprotein, Alpha-2-glycoprotein zinc, and zinc-alpha-2-glycoprotein.