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  • Title: Transformation of Xanthomonas campestris pathovar campestris with plasmid DNA.
    Author: Atkins DT, Barber CE, Daniels MJ.
    Journal: J Gen Microbiol; 1987 Oct; 133(10):2727-31. PubMed ID: 3449597.
    Abstract:
    Procedures for the introduction of plasmid DNA into Gram-negative bacteria have been adapted and optimized to permit transformation of the plant pathogen Xanthomonas campestris pathovar campestris with the cloning vector pKT230 and other broad-host-range plasmids. The technique involves CaCl2-induced competence and heat shock and is similar to that routinely used for Escherichia coli. Wild-type X. c. campestris strains appear to restrict incoming unmodified DNA, so that plasmid DNA for transformation must be prepared from X. c. campestris (into which it has previously been introduced by conjugation). To overcome this disadvantage a restriction-deficient mutant has been isolated.
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