FIG 1.
MbtS is a putative membrane-bound transcription factor. (A) Schematic presentation of the operon containing mbtS. Two promoters, PmbtS and P2642, are shown as triangular flags. The numbers indicate the relative nucleotide positions, where the start codon of mbtS is set to +1. (B) Topology of the MbtS protein predicted with SMART (http://smart.embl-heidelberg.de/). The pertinent amino acid positions are indicated. TM, transmembrane helix; N, N terminus; C, C terminus; IN, cytoplasm; OUT, extracytoplasmic region.