NNMLQRQANCNLKVNGCNKIYNPICGSDGITYANECLLCLENKKRQTSILVEKSGPC PSTI 57 This is a trypsin inhibitor, its physiological function is to prevent the trypsin-catalyzed premature activation of zymogens within the pancreas. Pancreatic secretory trypsin inhibitor Serine protease inhibitor Kazal-type 1 ISK1_CANFA SPINK1