Chymotrypsinogen

... peptide bonds Trypsin (secreted as trypsinogen) - made in pancreas, functions in the small intestine to break specific peptide bonds and converts chymotrypsinogen to chymotrypsin Chymotrypsin (secreted as chymotrypsinogen) - made in pancreas, functions in small intestine to break peptide bonds ...

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... is simply the "inactive" precursor of an enzyme, or the proenzyme; for example, chymostrypsinogen is the proenzyme of chymotrypsin; chymotrypsinogen is activated by proteolysis to yield the active enzyme. I say "inactive" because some proenzymes can self-activate--others ...

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