Chymotrypsinogen is an inactive precursor, or zymogen, of the enzyme chymotrypsin, which plays a crucial role in the digestion of proteins. It is produced in the pancreas and released into the small intestine, where it is activated by the enzyme trypsin. Once activated, chymotrypsin helps break down proteins into smaller peptides, facilitating their absorption in the body. This process is essential for proper nutrition and digestion, as proteins are vital macromolecules that provide amino acids necessary for various bodily functions.