Provided below are ELISA kits targeting calreticulin, a human protein encoded by CALR. This protein is 417 amino acids long, with a mass of 48.1 kDa, and is a member of the Calreticulin family. This is reported to be a cytoplasmic and secreted protein. Glycosylation sites have been reported. Other alias names for this protein include: CRP55, HACBP, Sicca syndrome antigen A (autoantigen Ro; calreticulin), calregulin, epididymis secretory sperm binding protein Li 99n, grp60, and HEL-S-99n. 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.