Despite enormous progress in understanding the fundamentals of bacterial gene regulation,
our knowledge remains limited when compared with the number of bacterial genomes and …

This review presents a comparison between the complex genetic regulatory networks that
control nitrogen fixation in three representative rhizobial species, Rhizobium meliloti …

Biosphere nitrogen is subjected to rapid turnover, and because it is eventually lost as
nitrogen into the atmosphere, its maintenance requires continuous replenishment with …

Bacterial enhancer binding proteins (bEBPs) are transcriptional activators that assemble as
hexameric rings in their active forms and utilize ATP hydrolysis to remodel the conformation …

The initiation of transcription is a complex process involving many different steps. These
steps are all potential control points for regulating gene expression, and many have been …

Promoters recognized by the RNA-polymerase with the alternative sigma factor σ54 (Eσ54)
are unique in having conserved positions around-24 and-12 nucleotides upstream from the …

Bacteria synthesize a number of different sigma factors which allow the co‐ordinate
expression of groups of genes owing to the ability of sigma to confer promoter‐specific …

The regulatory regions for 119 Escherichia coli promoters have been analyzed, and the
locations of the regulatory sites have been cataloged. The following observations emerge.(i) …

DNA sequence analysis of a 12236 by fragment, which is located upstream of nifE in
Rhodobacter capsulatus nif region A, revealed the presence of ten open reading frames …

Production of a potent urease has been described as a trait common to all Helicobacter
pylori so far isolated from humans with gastritis as well as peptic ulceration. The detection of …