Table 2 Coagulation and Plasminogen System Parameters in B6 and A/J inbred mouse strains B6 A/J Prothrombin Time (sec) 17 ± 1 18 ± 1 aPTT Time (sec) 66 ± 3 61 ± 7 Plasminogen (μg/mL) 131 ± 5 176 ± 9** Fibrinolytic Activity (nM) 2.6 ± 0.1 3.0 ± 0.1* PAI-1 Antigen (ng/mL) 7.4 ± 0.7 7.5 ± 0.7 PAI-1 Activity (U/mL) 185 ± 10 229 ± 8** α2-antiplasmin (μg/mL) 170 ± 6 195 ± 5** Fibrinogen (ng/mL) 1.6 ± 0.04 1.7 ± 0.05* Values are the mean ± SEM. *P < 0.05, **P < 0.01. n = 5–8.