Nucleotide sequence of the E. aerogenes fragment containing the putative pho box (underlined), putative −35 and −10 regions (bold), putative transcription start site (+1, bold) and the putative start codon of ugpA (bold). The alignment of the putative E. aerogenes pho box with the consensus sequence of the pho box from E.coli is shown below the sequence for comparison (where K represents G or T, W represents A or T, and Y represents C or T).