Figure 7
Analysis of the system efficiency in constant steady state total flux out of the Calvin-Benson cycle and dependent on whether the minor sinks are or considered in the model or not. Corrected Zhu model, modified for description of cyanobacteria, was used as a template for this analysis. Model C1: the minor sinks for DHAP, E4P, Ri5P and PGCA were implemented into the model indirectly within the PGA sink. Model C2: the minor sinks for DHAP, E4P, Ri5P and PGCA were encoded into the model directly (reactions described by rate equations). Model D1: the minor sinks for DHAP, E4P and Ri5P were implemented into the model indirectly within the PGA sink, PGCA sink is implemented as a first step of photorespiration (O2 fixation). D2 model: the minor sinks for DHAP, E4P and Ri5P were encoded into the model directly, PGCA sink is implemented as a first step of photorespiration. The basic fluxes for Ri5P, DHAP, E4P, PGA and PGCA were estimated on the basis of flux balance analysis of the cyanobacterial metabolic network [5], (Henning Knoop, personal communication). Solid black line represents the ratio in the mass production and E4P for models C (C1/C2); dashed black line represents the ratio in the mass production and E4P for models D (D1/D2); solid gray line shows ratio in the sinks production for models C and dashed gray line indicates the ratio in the sinks production for models D.