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Heatmap constructed using up-regulated (red) and down-regulated (blue) SA187 genes encoding sulfur metabolic transporters and enzymes during endophyte colonization of Arabidopsis compared to free-living bacteria (A). Up-regulation of the SA187 sulfur metabolic pathway by Arabidopsis. APS = adenosine 5′-phosphosulfate, PAPS = 3′-phosphoadenosine-5′-phosphosulfate, KMBA = 2-keto-4-methylthiobutyric acid (B).
