Differential RNA-seq analysis of the kdp operon. The tracks depict, from top to bottom, the positions of annotated genes in a condensed (packed) format, and the number of times each nucleotide position was the first in dRNA-seq reads (following TAP treatment) for samples taken following sub-culture without and with potassium downshift. The remainder of the labelling is as Figure 2. The inset shows the sequence in which the TSS was located. Black arrows indicate the position of direct repeats predicted to be the binding site of KdpE, the response regulator of the two component system, and underlining indicates the probable positions of the −35 and −10 boxes of the corresponding promoter (see text for details). The position of the TSS (+1) is marked.