In the ERG11 regulatory circuit, the nucleus behaves as a computational entity where redox chemistry, chromatin state, and transcription factor dynamics form feedback loops. Heme oxidation states can alter the binding affinity of transcription factors like Upc2p and Ndt80p, modulating ERG11 expression (Todd & Selmecki, 2020). Simultaneously, histone modifications propagate epigenetic signals that reinforce or suppress transcription. This coupling ensures that the nuclear system processes environmental information as a continuous chemical-to-genetic conversion. The nucleus, therefore, functions as an analog computer — ERG11 being one of its most finely tuned feedback sensors

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