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Table 1 Boolean truth tables for both activating and inhibiting gene interactions

From: Boolean factor graph model for biological systems: the yeast cell-cycle network

Activation Inhibition
\(x_{1}\) \(x_{2}\) \(x_{2}^{\prime }\) \(x_{1}\) \(x_{2}\) \(x_{2}^{\prime }\)
0 0 0 0 0 0
0 1 1 0 1 1
1 0 1 1 0 0
1 1 1 1 1 0
  1. Column \(x_{1}\) represents the state of a regulator node, and column \(x_{2}\) denotes the child node state at time t. The output state of the child node at time \(t+1\) is denoted by column \(x_{2}^{\prime }\). For activation, \(x_{2}^{\prime } = x_{1} \vee x_{2}\), and for inhibition, \(x_{2}^{\prime } = (x_{1} \oplus x_{2}) \wedge x_{2}\). Only when a parent node is active does it contribute information to the child node