FIG. 6.

Determination of the transcription start site of bxl operon. (A) Primer extension and nucleotide sequencing were performed with the same FITC-labeled primer. The nucleotide sequence around the transcription start site is shown in lanes A, C, G, and T. The transcriptional start site is shown by an arrow (lane P). (B) Nucleotide sequence of the 5′ upstream region of bxlE. The deduced amino acid sequences of BxlR and BxlE are shown below the nucleotide sequence. The transcriptional start site is indicated with +1. The putative −35 and −10 regions are shown by boxes.