Fig. 4

Relative intracellular fluxes of day and night metabolism in A. thaliana leaves as predicted from elementary flux mode simulation. The value on the arrow and the thickness of the arrow represent the average flux value of the top 1 % biomass producing modes of Arabidopsis leaves in the light (left) and in the dark (right), as predicted by the simulation, excluding energetically inefficient modes. All fluxes are normalized to the substrate uptake flux and are given in mol mol⁻¹ substrate. To enable a direct comparison, flux values, linked to light-metabolism are normalized to 100 mol of CO₂ uptake and flux values, linked to dark-metabolism are normalized to 50 mol of starch degradation, as starch is represented by carbon twelve dimers. The arrow thicknesses are given in log-scale. The arrows pointing towards the Arabidopsis rosettes visualize the amount of building blocks for biomass synthesis. Biomass (BM) synthesis in expressed in g BM