Adaptive gene regulatory networks

Details Adaptive gene regulatory networks Adaptive gene regulatory networks

2009-02-17

arxiv.org/abs/0902.2918v1

Biology

Quantitative Biology

Molecular Networks

5 pages RevTex

Scientific paper

Regulatory interactions between genes show a large amount of cross-species variability, even when the underlying functions are conserved: There are many ways to achieve the same function. Here we investigate the ability of regulatory networks to reproduce given expression levels within a simple model of gene regulation. We find an exponentially large space of regulatory networks compatible with a given set of expression levels, giving rise to an extensive entropy of networks. Typical realisations of regulatory networks are found to share a bias towards symmetric interactions, in line with empirical evidence.

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