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Six nod box regulatory sequences are present in the Rhizobium meliloti genome. We have analysed the DNA region located downstream of nod box n6, and identified three open reading frames, designated nolQa, nolQb andnolS. LacZ fusions in these ORFs are not induced by classical nod gene inducers, which indicates that their expression either is not under the control of the nod box, or involves another...
The nucleotide sequence of the Rhizobium meliloti (Rm) fliP gene was determined. Rm strains carrying insertions within this gene were non-motile, lacked flagella and formed normal N 2 -fixing root nodules on alfalfa. The FliP protein showed similarity to several bacterial gene products involved in pathogenicity in both plant and animal pathogens. It is likely that all of these proteins...
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