1I8N:
reference: The structure of leech anti-platelet protein, an inhibitor of haemostasis., Huizinga EG, Schouten A, Connolly TM, Kroon J, Sixma JJ, Gros P, Acta Crystallogr D Biol Crystallogr 2001 Aug;57(Pt 8):1071-8. PMID: 11468390

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