Biology – Quantitative Biology – Quantitative Methods
Scientific paper
2009-04-17
Biology
Quantitative Biology
Quantitative Methods
4 pages, 3 figures, and supporting material
Scientific paper
Knowing which mode of combinatorial regulation (typically, AND or OR logic operation) that a gene employs is important for determining its function in regulatory networks. Here, we introduce a dynamic cross-correlation function between the output of a gene and its upstream regulator concentrations for signatures of combinatorial regulation in gene expression noise. We find that the correlation function is always upwards convex for the AND operation whereas downwards convex for the OR operation, whichever sources of noise (intrinsic or extrinsic or both). In turn, this fact implies a means for inferring regulatory synergies from available experimental data. The extensions and applications are discussed.
Yuan Zhanjiang
Zhang Jiajun
Zhou Tianshou
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