1A5I:
reference: Catalytic domain structure of vampire bat plasminogen activator: a molecular paradigm for proteolysis without activation cleavage., Renatus M, Stubbs MT, Huber R, Bringmann P, Donner P, Schleuning WD, Bode W, Biochemistry 1997 Nov 4;36(44):13483-93. PMID: 9354616

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