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Venn diagram of the overlap of the iron deficiency response genes among the data sets for defining the conserved iron starvation response genes. (A) upregulated genes; (B) downregulated genes; (C,D) Gene ontology enrichment analysis (biological process, P < 0.001) of the overlap genes, 61 and 10, from the up- and down-regulated genes under iron starvation among the four data sets, respectively.
