This short domain on coagulation enzyme factor Xa is found to be the target for a potent inhibitor of coagulation, TAK-442 [1].

1: Discovery of a tetrahydropyrimidin-2(1H)-one derivative (TAK-442) as a potent, selective, and orally active factor Xa inhibitor. Fujimoto T, Imaeda Y, Konishi N, Hiroe K, Kawamura M, Textor GP, Aertgeerts K, Kubo K; J Med Chem. 2010;53:3517-3531. PMID:20355714