Provided below are ELISA kits targeting chordin, a human protein encoded by CHRD. This protein is 955 amino acids long, with a mass of 102 kDa, and is a member of the Chordin family. 5 isoforms have been identified. This is reported to be a secreted protein. Glycosylation sites have been reported. ELISA kits are available that are reactive to human, mouse, rat, bovine, chicken, primate, guinea pig, and other mammalian variants of the target antigen.