1AD8:
reference: Molecular design and characterization of an alpha-thrombin inhibitor containing a novel P1 moiety., Malikayil JA, Burkhart JP, Schreuder HA, Broersma RJ Jr, Tardif C, Kutcher LW 3rd, Mehdi S, Schatzman GL, Neises B, Peet NP, Biochemistry 1997 Feb 4;36(5):1034-40. PMID: 9033393

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