The effect of negative feedback loops on the dynamics of Boolean networks

Details The effect of negative feedback loops on the dynamics of Boolean networks The effect of negative feedback loops on the dynamics of Boolean networks

2007-07-23

arxiv.org/abs/0707.3468v2

Biology

Quantitative Biology

Quantitative Methods

Scientific paper

10.1529/biophysj.107.125021

Feedback loops in a dynamic network play an important role in determining the dynamics of that network. Through a computational study, in this paper we show that networks with fewer independent negative feedback loops tend to exhibit more regular behavior than those with more negative loops. To be precise, we study the relationship between the number of independent feedback loops and the number and length of the limit cycles in the phase space of dynamic Boolean networks. We show that, as the number of independent negative feedback loops increases, the number (length) of limit cycles tends to decrease (increase). These conclusions are consistent with the fact, for certain natural biological networks, that they on the one hand exhibit generally regular behavior and on the other hand show less negative feedback loops than randomized networks with the same numbers of nodes and connectivity.

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