Human activities have resulted in the release and introduction into the environment of a
plethora of aromatic chemicals. The interest in discovering how bacteria are dealing with …

▪ Abstract The xyl genes of Pseudomonas putida TOL plasmid that specify catabolism of
toluene and xylenes are organized in four transcriptional units: the upper-operon …

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 …

The principal goal of this work was to establish the feasibility of two biosensor technologies
with enhanced specificity and selectivity for the detection of several bioavailable heavy …

The mode of DNA binding of the Fur (ferric uptake regulator) repressor which controls
transcription of iron-responsive genes in Escherichia coli, has been re-examined. Using as a …

In addition to the sugar phosphotransferase system (sugar PTS) dedicated to carbohydrate
uptake, many Gram-negative bacteria possess a so-called nitrogen PTS (PTS Ntr). Although …

Degradation of phenol by Acinetobacter calcoaceticus NCIB8250 involves (sigma54-
dependent expression of a multicomponent phenol hydroxylase and catechol 1, 2 …

Although different biological approaches for detection of anti‐personnel mines and other
unexploded ordnance (UXO) have been entertained, none of them has been rigorously …

Summary σ54 is unique among the bacterial sigma factors. Besides not being related in
sequence with the rest of such factors, its mechanism of transcription initiation is completely …

The sequence elements determining the binding of the σ 54-containing RNA polymerase (σ
54-RNAP) to the Pu promoter of Pseudomonas putida have been examined. Contrary to …