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Coexpression p and r2 values for genes from the AraCyc database of metabolic pathways. A, Logarithm (base 10) of regression p values plotted against corresponding r2 values obtained from regressing expression values for 1,330 AraCyc genes against all genes on the ATH1 expression microarray. B to D, Example plots showing positive (D) and negative (B) linear relationships between normalized expression values (log base 2) for weakly (C) and strongly (B and D) coexpressed genes.
