Figure 2From: Enhanced oxygen consumption in Herbaspirillum seropedicae fnr mutants leads to increased NifA mediated transcriptional activationThe nifA gene expression is enhanced in the fnr mutant strains from H. seropedicae. (A) Schematic representation of native and mutant nifA::lacZ fusions assayed for β-Galactosidase activity in fnr mutant strains is showed. Full crosses indicate deletions, while dotted crosses indicate point mutations. The β-Galactosidase activity of different nifA::lacZ transcriptional fusions in H. seropedicae SmR1 and fnr mutant strains were assayed under 5 mM (B) or 20 mM of NH4Cl (C). The colour code used for each transcriptional fusion in the bar graphs in B and C is represented in A. Results showed are representative of two independent experiments.Back to article page