Anti-chitinase 3 like 1 antibodies are used for the immunodetection of the protein encoded by the CHI3L1 gene. In humans, the canonical protein has a reported length of 383 amino acid residues and a mass of 42.6 kDa. Its subcellular localization is in the ER, cytoplasm, and is secreted. A member of the Glycosyl hydrolase 18 protein family, it is known to be involved with the apoptotic pathway and carbohydrate metabolism and homeostasis. Post-translational modifications have been described, including glycosylation. The gene encoding this protein is implicated in Asthma-related traits. Other names for this target antigen include CGP-39, GP-39, GP39, HC-gp39, HCGP-3P, YK-40, YKL-40, and ASRT7. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species. Over 80 citations in the literature describe the use of chitinase 3 like 1 antibodies in research. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.