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Figure 1 | BMC Bioinformatics

Figure 1

From: Yeast pheromone pathway modeling using Petri nets

Figure 1

A simple Petri net. The top figure shows an example of a Petri net with 3 places p1, p2 and p3 and a transition T1. p1 has 10 tokens and p2 has 7 tokens, w(p1,T1) = 5, w(p2,T2) = 6 and w(T1,p3) = 9. When T1 fires, the Petri net will change as shown in the bottom figure. After T1 has fired, p1 has 5 tokens, p2 has 1 token and p3 has 9 tokens.

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