1TGS:
reference: Three-dimensional structure of the complex between pancreatic secretory trypsin inhibitor (Kazal type) and trypsinogen at 1.8 A resolution. Structure solution, crystallographic refinement and preliminary structural interpretation., Bolognesi M, Gatti G, Menagatti E, Guarneri M, Marquart M, Papamokos E, Huber R, J Mol Biol 1982 Dec 25;162(4):839-68. PMID: 7169635

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