Figure 1From: Rational design of 13C-labeling experiments for metabolic flux analysis in mammalian cellsMammalian network model. Network model for HEK-293 cells adapted from Henry et al. (2011). Two free fluxes exist in the model, the oxidative pentose phosphate pathway flux and pyruvate carboxylase flux. Dashed lines indicate measured external rates. Abbreviations: c = cytosol, ext = external.Back to article page