Figure 2From: Parameter estimation for stiff equations of biosystems using radial basis function networksStiff model of the metabolic pathway used in this work. It was composed of 5 reactions with 6 reactants, where X5 is the final product, X1 the external substance with fixed concentration, and X2, X3, X4 and x6 are intermediate metabolites, e1, E2, E3, and E4 are enzymes. The dotted line represents a feedback reaction. Details of the numbered reactions are shown in Table 1.Back to article page