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. 2020 Jun 9;11:1089. doi: 10.3389/fmicb.2020.01089

Figure 4.

Figure 4

SrrA/SrrB binding sequences. (A) Characterization of the upstream region of srrB. Putative srrB promoter regions (−35 and −10) are boxed. Shine-Dalgarno (SD) sequence and transcriptional start site (TSS) are shown as red boldface letters. SrrA-binding sequence is shown as blue boldface letters. Pink and green highlights indicate SrrB and Orf80 coding sequences, respectively. (B) Comparison of the binding sequences for SrrA and SrrB. The confirmed SrrA- and SrrB-binding sequences are shown as blue and red underlines, respectively. Possible SrrA-binding sites at upstream of srrW and srrX are deduced from sequence data. For comparison of consensus sequence, SrrA-binding sites at the upstream of srrY (SrrA-srrY) are shown as green. Bases identical with SrrA-srrY are shown in boldface letters. Complementary bases are indicated as asterisks. The center of palindromes is shown as a vertical dashed line.