Additional file 4.

AtWRKY genes scatter plots. Typical scatter plot of the expression level of two pairs of AtWRKY genes across the set of Arabidopsis microarray experiments used for the Pearson Correlation Coefficient analysis. Each grey dot represents the simultaneous expression level of the two genes in one microarray experiment. A: The expression level of AtWRKY40 is not correlated with the expression of AtWRKY35. B: A strong correlation is present between AtWRKY40 and AtWRKY33.

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Berri et al. BMC Plant Biology 2009 9:120   doi:10.1186/1471-2229-9-120