4ZOT:
reference: Structure of BbKI, a disulfide-free plasma kallikrein inhibitor., Zhou D, Hansen D, Shabalin IG, Gustchina A, Vieira DF, de Brito MV, Araujo AP, Oliva ML, Wlodawer A, Acta Crystallogr F Struct Biol Commun. 2015 Aug 1;71(Pt 8):1055-62. doi:, 10.1107/S2053230X15011127. Epub 2015 Jul 29. PMID: 26249699

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