Fig 7. Influence of nitrate (NO₃^-) on the number of RegA, NarL and FNR dependent gene expressions.

A: VENN Diagramm presenting the number of genes affected by the regulatory interactions between RegA, FNR and NarL obtained from global gene expression experiments. B. VENN diagrams show the total numbers of either RegA, NarL or FNR regulated genes in absence (orange) and presence (blue) of NO₃^-. The overlaps represent the genes influenced under the respective regulators RegA, NarL and/or FNR and nitrate absence or presence (A) or only under both growth conditions (B).–NO₃^-: growth without nitrate as TEA, + NO₃^-: growth with nitrate as TEA.