Figure 1
From: Dynamic estimation of specific fluxes in metabolic networks using non-linear dynamic optimization
Example of metabolic reaction network, stoichiometric matrix and irreversibility matrix. A small-scale example of a metabolic reaction network with 4 fluxes, 2 intracellular metabolites, 2 extracellular metabolites and biomass. The number of free fluxes for this network is 2. In the middle is the corresponding stoichiometric matrix, split up into the parts for intracellular and extracellular metabolites, and biomass, and at the bottom is the irreversibility matrix for this network.