In vitro transcription from the promoter for the nitrogen fixation regulatory operon nifLA of K.
pneumoniae requires four protein fractions: the core form of RNA polymerase; NTRA, an …

Transcriptional activation of nitrogen fixation genes by Nrt A in Klebsiella pneumoniae
requires an upstream Nif A binding site. We now report that the introduction of haif turns of …

Three proteins involved in nitrogen regulation In Klebsiella pneumoniae, NTRA, NTRB and
NTRC, have been purified. In a defined in vitro system all three NTR proteins are required …

The nitrogen fixation promoters of Klebsiella pneumoniae are atypical procaryotic promoters
lacking the usual-10 and-35 elements, requiring instead conserved sequences around-12 …

ntr (nitrogen regulated) and nif (nitrogen fixation) promoters are structurally similar to each
other but bear no resemblance to canonic Escherichia coli promoters. ntr promoters are …

A number of in-frame deletions have been constructed in the Klebsiella pneumoniae
regulatory gene nifL. The effects of each nifL mutation on NifA-mediated expression from the …

The ntrC and nifA gene products of Klebsiella pneumoniae are transcriptional activators
involved in general nitrogen control and nif‐specific regulation, respectively. Multicopy …

Certain mutations in the nifL gene of the Klebsiella pneumoniae nitrogen fixation (nif) gene
cluster resulted in altered nif regulaiton such that nitrogenase synthesis was no longer …

The product of the Klebsiella pneumoniae nitrogen regulatory gene ntrC has been purified
and shown to be a dimeric protein of subunit molecular weight 54Kd, designated NtrC. In an …

The nifLA operon of Klebsiella pneumoniae codes for the two antagonistic regulatory
proteins which control expression of all other nitrogen fixation genes. NifA is a transcriptional …