Ready-to-use ELISA kits are available for the detection of h-cGAS, an alias of the protein, cyclic GMP-AMP synthase. The official gene symbol is CGAS. The protein, with a mass of 58.8 kDa and length of 522 residues, is reported to be cytoplasmic, nuclear and membrane-associated. It is a member of the Mab-21 family and may be known by other names, including: MB21D1, C6orf150, mab-21 domain-containing protein 1, cGAMP synthase, Mab-21 domain containing 1, and 2'3'-cGAMP synthase.