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Relationship between the pathway length and the degree of feedback inhibition on the threshold for stability. εinh is the elasticity of the feedback inhibition and εsub is the elasticity of the distal step with respect to the signal.
| Length of Pathway | Instability Threshold −εinh/εsub |
|---|---|
| 1 | stable |
| 2 | stable |
| 3 | 8.0 |
| 4 | 4.0 |
| 5 | 2.9 |
| 6 | 2.4 |
| 7 | 2.1 |
| ⋮ | ⋮ |
| ∞ | 1.0 |
