R1

R1

X > Xa

R2

R2

Xa > Xa_ATIII

R3

R3

Va + Xa + PL = PT

R4

R4

V > Va

R5

R5

II > IIa

R6

R6

II > IIa

R7

R7

IIa > IIa_alpha2M

R8

R8

IIa > IIa_ATIII

Global parameters

Assignment rules

AmAct = IIa + 0.556 * IIa_alpha2M

Function definitions

HenriMichaelisMenten_irreversible_kcat(kcat, enzyme, substrate, Km) = kcat * enzyme * substrate / (Km + substrate)

Note that constraints are not enforced in simulations. It remains the responsibility of the user to verify that simulation results satisfy these constraints.


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Abstract
We perform a qualitative analysis of a differential equation that was originally introduced
by Stortelder, Hemker and Hemker to model the formation of thrombin, and discuss issues
of controllability and stabilizability. Results include a general proof of convergence to
equilibrium, and of local exponential stabilizability.
The SBML for this model was obtained from the BioModels database (BioModels ID: BIOMD0000000366) Biomodels notes: Reproduction of figure 2 of the article. Model integrated using PySCeS and plotted with Matplotlib. JWS Online curation: This model was curated by reproducing the figures as described in the BioModels Notes. No additional changes were made.