FIG. 4.

Analysis of LexA binding to PCR products spanning at least 500 bp upstream of the coding region and extending at least 100 bp into it for ssb and uvrA. The top part shows schematically the locations of the PCR products in relation to the coding sequence and gives their sizes. Shown below are results of the assay for LexA binding to these fragments, done as described for Fig. 2. The recA-up fragment was included as a positive control. The figure was compiled using Adobe Photoshop and Macromedia Freehand.