thumb|Chymotrypsinogen Chymotrypsinogen is an inactive precursor (zymogen) of chymotrypsin, a digestive enzyme which breaks proteins down into smaller peptides. Chymotrypsinogen is a single polypeptide chain consisting of 245 amino acid residues. It is synthesized in the acinar cells of the pancreas and stored inside membrane-bounded granules at the apex of the acinar cell. Release of the granules from the cell is stimulated by either a hormonal signal or a nerve impulse, and the granules spill into a duct leading into the duodenum.Berg.M.J., Tymoczko.L.J., Stryer.L., Gatto Jr. J.G. Biochemistry, 7th Ed.; Freeman: New York, 2012.
thumb|Chymotrypsinogen Chymotrypsinogen is an inactive precursor (zymogen) of chymotrypsin a digestive enzyme which breaks proteins down into smaller peptides Chymotrypsinogen is a single polypeptide chain consisting of 245 amino acid residues It is synthesized in the acinar cells of the pancreas and stored inside membrane-bounded granules at the apex of the acinar cell Release of the granules from the cell is stimulated by either a hormonal signal or a nerve impulse and the granules spill into a duct leading into the duodenumBergMJ TymoczkoLJ StryerL Gatto Jr JG Biochemistry 7th Ed; Freeman New York 2012