Figure 5From: Global transcriptional analysis of nitrogen fixation and ammonium repression in root-associated Pseudomonas stutzeri A1501Intergenic region between nifA and pnfA and construction of the pnfA non-polar mutant A1325. The open and filled boxes represent the putative σ54-dependent promoter and upstream activator sequences, respectively. The inverted triangle indicates the location of the mutations inserted into pnfA via homologous suicide plasmid integration.Back to article page