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Let’s start by considering a very simple feedback loop, namely a system with just two genes A and B which repress each other. Such a system can be in two possible states (it is bistable): A is expressed and thus suppresses B, which is not or hardly expressed. B is expressed and thus suppresses A, which is not or hardly expressed. We may perfectly ...


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Quantitative vs. qualitative Quantitative description usually implies numbers, rather than just saying which response follows which stimulus. For example, describing a chain of biochemical transformations is qualitative description - we know what processes happen, in which order, etc. Quantifying how many of the molecules would actually undergo this ...


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