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. 2010 Jul 21;4:10. doi: 10.1186/1754-1611-4-10

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Copyright ©2010 Cox et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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The cross correlation function reveals regulatory connections. (A) A stochastic mathematical model of noisy LacI co-regulation (Methods) predicts a large, symmetric yfp-rfp cross correlation function and smaller asymmetric rfp-cfp and yfp-cfp cross correlations. (B) Experimental cross correlation between yfp and rfp averaged over 5 microcolony movies. The error bars show the standard error between movies. (C) Experimental cross correlation between rfp and cfp. (D) Experimental cross correlation between yfp and cfp.