4AJU:
reference: Structural basis for catalytic activation of protein Z-dependent protease inhibitor (ZPI) by protein Z., Huang X, Yan Y, Tu Y, Gatti J, Broze GJ Jr, Zhou A, Olson ST, Blood. 2012 Aug 23;120(8):1726-33. doi: 10.1182/blood-2012-03-419598. Epub 2012, Jul 11. PMID: 22786881

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