Anti-chymotrypsin C antibodies are used for the immunodetection of the protein encoded by the CTRC gene. In humans, the canonical protein has a reported length of 268 amino acid residues and a mass of 29.5 kDa. A member of the Peptidase S1 protein family, it is reported to regulate activation and degradation of trypsinogens and procarboxypeptidases by targeting specific cleavage sites within their zymogen precursors. Post-translational modifications have been described, including glycosylation. The gene encoding this protein is implicated in Pancreatitis. Other names for this target antigen include ELA4, caldecrin, chymotrypsinogen C, elastase 4, elastase IV, serum calcium decreasing factor, and CLCR. Gene orthologs have been identified in the mouse, rat, bovine, chimpanzee and chicken species. A number of chymotrypsin C antibodies have been mentioned in research publications and have associated citations. ELISA is a widely used application for these antibodies. Western Blot and Immunohistochemistry are also common applications.