Figure 1From: Modularization of biochemical networks based on classification of Petri net t-invariantsA biochemical example for the Petri net firing rule. The stoichiometric equation represents the conversion of glucose into ethanol, an alcoholic fermentation. The stoichiometric factors correspond to the arc weights in the Petri net. Figure 1a indicates the marking before the firing, whereas Figure 1b corresponds to the marking after the firing.Back to article page