Bacteria continuously adapt to changes in their environment. Responses are largely
controlled by signal transduction systems that contain two central enzymatic components, a …

DNA loo** is generated by a protein or complex of proteins that simultaneously binds to
two different sites on a DNA molecule. Consequently, the intervening tens to thousands of …

We report that the ntrB and ntrC proteins of Bradyrhizobium sp.[Parasponia] strain RP501
share homology with other regulatory proteins. There is extensive conservation of C-terminal …

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 …

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 …

Azotobacter vinelandii genes contained within the major nif-cluster and designated orf6,
nifU, nifS, nifV, orf7, orf8, nifW nifZ, nifM, and orf9 are organized into at least two overlap** …

Determination of a 28,793-base-pair DNA sequence of a region from the Azotobacter
vinelandii genome that includes and flanks the nitrogenase structural gene region was …

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) …

SUMMARY ς54 has several features that distinguish it from other sigma factors in
Escherichia coli: it is not homologous to other ς subunits, ς54-dependent expression …

Abstract The complete nucleotide sequence (24,206 base-pairs) of the Klebsiella
pneumoniae gene region for nitrogen fixation (nif) is presented. Coding regions …