1F0U:
reference: Crystal structures of human factor Xa complexed with potent inhibitors., Maignan S, Guilloteau JP, Pouzieux S, Choi-Sledeski YM, Becker MR, Klein SI, Ewing WR, Pauls HW, Spada AP, Mikol V, J Med Chem 2000 Aug 24;43(17):3226-32. PMID: 10966741

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