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. 2006 May 20;2:31–39. doi: 10.1007/s11306-006-0017-3

Figure 3.

Figure 3.

The plot of output (P1+P2) against input as phenotype in phase plane analysis. The basal phenotype is indicated by Inline graphic. The condition v 5=0 is indicated by Δ, v 2=0 indicated by ×, and v 4=0 indicated by Inline graphic. The slope of the line indicates the amount of input required for a certain amount of output.