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Figure 3 | EURASIP Journal on Bioinformatics and Systems Biology

Figure 3

From: Stability from Structure: Metabolic Networks Are Unlike Other Biological Networks

Figure 3

The artificial network consisting of the two reactions shown at the top left of this figure is used to illustrate how matrices and are constructed. Also, an intermediate matrix (not described in the main text) is shown, which is the result of the multiplication . Matrix is constructed by setting all diagonal entries to zero and putting ones at the locations where there are only positive values in . Matrix is constructed in a similar manner for the diagonal and positive entries. However, the entries of consisting of only negative values are set to 2, whereas the entries consisting of both positive and negative values are set to 3. A drawing of the resulting uncolored and colored networks is shown at the bottom right.

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