Figure 5.

Tn7 and Tn3 target site consensus sequences. (A) Consensus sequence logo drawn from 7176 defined Tn7 insertion sites. In this logo, the nucleotide frequency at each position is indicated by the relative height of each letter; the degree of sequence conservation at each position is indicated as the total height of a stack of letters, measured in arbitrary units called “bits.” The y-axis is measured in bits, with two bits possible at each position. Note the y-axis is truncated at 0.5 bits to conserve space. The x-axis indicates nucleotide position in a 41-base pair window centered on the transposon insertion. The “0” position indicates the nucleotide immediately 5′ of the insertion. The negative positions are upstream of the insertion; the positive positions are downstream of the insertion. (B) Consensus sequence logo drawn from 10,174 defined Tn3 insertion sites. Here, the y-axis is truncated at 1 bit.