compartment k1 X VIIa_TF k2 VIIa_TF_X compartment k1 VIIa_TF_X compartment k1 VIIa_TF_Xa k2 Xa VIIa_TF compartment k1 Xa TFPI k2 Xa_TFPI compartment k1 VIIa_TF Xa_TFPI k2 Xa_TFPI_VIIa_TF