Bacteria (microorganisms) Base Sequence Genes, Bacterial Molecular Sequence Data Negibacteria Xanthomonas Xanthomonas campestris Xanthomonas campestris pv. campestris article biosynthesis nonhuman nucleotide sequence xanthan Chromosome Mapping DNA Primers DNA, Bacterial Genetic Vectors Gram-Negative Bacteria Mutagenesis, Site-Directed Mutation Operon Plant Diseases Polysaccharides, Bacterial Reverse Transcriptase Polymerase Chain Reaction Uridine Diphosphate Glucose Virulence bacterial virulence bacterium identification carboxy terminal sequence cloning vector