Fig. 1
From: Enumeration of minimal stoichiometric precursor sets in metabolic networks
Network with one source p and one target t illustrating the difference between the two models used by Eker et al. [8], and the limitation of the machinery-duplicating model. The source p is a precursor set for the production of the target if the steady-state model is assumed. In this toy example, the target can not be produced following the machinery-duplicating model