Organization of the ytfE, hmpA, ygbA, and tehA promoters. Sequences that match the inverted repeat that is the proposed YjeB binding site in ytfE (AAGATG-ATTT-AAAT-CATCTT) are underlined. Promoter elements (−10 sequences) and start codons are shown in boldface, and transcription start sites are indicated (+1). The mRNA start site and promoter sequences for hmpA have been reported previously (24). Start sites for ytfE, ygbA, and tehA were determined in the present study.