2HNT:
reference: Crystallographic structure of human gamma-thrombin., Rydel TJ, Yin M, Padmanabhan KP, Blankenship DT, Cardin AD, Correa PE, Fenton JW 2nd, Tulinsky A, J Biol Chem 1994 Sep 2;269(35):22000-6. PMID: 8071320

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