File:T--Aix-Marseille--Organization-of-the-caa-cal-operon.png

Figure adapted from: Lloubes et al., Nucleic Acids Research 1986 (DOI: 10.1093/nar/14.6.2621). Organization of the caa-cal operon and the cai gene. The nucleotide sequences for the promoters are presented: the recognition and binding sequences for RNA polymerase are presented as yellow boxed(-35 and -10 elements). SA indicates the transcriptional start site for the caa-cal operon. Arrows above the start site indicates the direction of transcription, the bold line indicates the major band detected by SI mapping. The binding site for LexA in the operator region for caa is indicated by brackets overlining the protected region for the sense-strand and brackets underlining the sequence (not represented) for the anti-sense strand. The two overlapped consensus "SOS sequences" are presented as a pink box.