Structural integrity of the gamma-carboxyglutamic acid domain of human blood coagulation factor IXa is required for its binding to cofactor VIIIa - Larson, PJ; Stanfield-Oakley, SA; VanDusen, WJ; Kasper, CK; Smith, KJ; Monroe, DM; High, KA (J Biol Chem., 1996)