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Two-component reciprocal repression. A reciprocal repression subnetwork consists of pair of genes (X1 and X2) in which each gene's product blocks transcription of the other gene, either as a monomer (Xi + Pj ⇌ XjPj for i ≠ j) or a dimer (Pi + PI ⇌ Pi Pi and Xi + Pj Pj ⇌ Xi Pj Pj for i ≠ j). Basal protein production (Xi → Xi + Pi) and protein degradation (Pi → ∅) are also included in specification of the subnetwork.
