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Rhizobia, bacterial symbionts of leguminous plants, produce lipo-chitin oligosaccharide (LCO) signal molecules that can induce nodule organogenesis in the cortex of legume roots in a host-specific way. The multi-unsaturated fatty acyl and the O-acetyl moieties of the LCOs of Rhizobium leguminosarum biovar viciae were shown to be essential for obtaining root(More)
Part of the open reading frame of uidA, encoding beta-glucuronidase, was sequenced and two differences were found with the previously reported nucleotide sequence [Jefferson et al., Proc. Natl. Acad. Sci. USA 83 (1986) 8447-8451]. One is a silent mutation, the other results in the Glu279-->Gln substitution.
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