1SKZ:
reference: X-ray structure of antistasin at 1.9 A resolution and its modelled complex with blood coagulation factor Xa., Lapatto R, Krengel U, Schreuder HA, Arkema A, de Boer B, Kalk KH, Hol WG, Grootenhuis PD, Mulders JW, Dijkema R, Theunissen HJ, Dijkstra BW, EMBO J 1997 Sep 1;16(17):5151-61. PMID: 9311976

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