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Medical Definition of Trypsin inhibitor
1. A peptide hydrolyzed off trypsinogen under the catalytic influence of enteropeptidase, with trypsin produced as a result; so called because the peptide masks or inhibits the active site of the trypsin molecule, one of the polypeptides, from various sources (e.g., human and bovine colostrum, soybeans, egg white), that inhibit the action of trypsin. Compare: Bowman-Birk inhibitor. (05 Mar 2000)