Figure 1From: Identification of ireA, 0007, 0008, and 2235 as TonB-dependent receptors in the avian pathogenic Escherichia coli strain DE205BExpression of the iron uptake-related genes in M9 media. The gene expression levels of the iron uptake-related genes in iron-rich or iron-depleted M9 media were tested by qRT-PCR. The relative gene expression levels were calculated using the 2−△△Ct method; the values are expressed as percentages.Back to article page