Provided below are ELISA kits targeting cholecystokinin, a human protein encoded by CCK. This protein is 115 amino acids long, with a mass of 12.7 kDa, and is a member of the Gastrin/cholecystokinin family. This is reported to be a secreted protein. Other alias names for this protein include: cholecystokinin triacontatriapeptide, and prepro-cholecystokinin. ELISA kits are available that are reactive to human, mouse, rat, bovine, chicken, primate, guinea pig, fish, and other mammalian variants of the target antigen.