The synthesis of extracellular enzymes and extracellular polysaccharide (EPS) in Xanthomonas campestris pathovar campestris (Xcc) is subject to co-ordinate regulation by a cluster of genes called rpf (for regulation of pathogenicity factors). These genes are located within a 21.9 kb region of the
A genomic library was prepared in Escherichia coli from DNA of wild-type Xanthomonas campestris pv. campestris (aetiological agent of crucifer black rot), partially digested with endonuclease EcoRI, using the mobilisable broad host range cosmid vector pLAFR1. Recombinant plasmids contained inserts
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