Provided below are ELISA kits targeting clusterin, a human protein encoded by CLU. This protein is 449 amino acids long, with a mass of 52.5 kDa, and is a member of the Clusterin family. 6 isoforms have been identified. This is reported to be a cytoplasmic, nuclear, mitochondrial and secreted protein. Glycosylation sites have been reported. Other alias names for this protein include: aging-associated protein 4, apolipoprotein J, complement cytolysis inhibitor, complement lysis inhibitor, ku70-binding protein 1, sulfated glycoprotein 2, and testosterone-repressed prostate message 2. ELISA kits are available that are reactive to human, mouse, rat, bovine, chicken, primate, guinea pig, fish, plant, and other mammalian variants of the target antigen.