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Genetic control of degradation of chlorinated benzoic acids in Arthrobacter globiformis, Corynebacterium sepedonicum and Pseudomonas cepacia strains.

The strains of Arthrobacter globiformis KZT1, Corynebacterium sepedonicum KZ4 and Pseudomonas cepacia KZ2 capable of early dehalogenation and complete oxidation of 4-chloro-, 2,4-dichloro-and 2-chlorobenzoic acids, respectively, have been analyzed for the origin of the genetic control of degradation. The occurrence and molecular sizes of plasmids in all the strains have been established. Plasmid pBS1501 was shown to control 4-chlorobenzoate dehalogenation in the case of KZT1 strain. The same possibility is proposed for plasmid pBS1502 for dehalogenation of 2,4DCBA by KZ4 strain. The chromosome localization of the genes controlling oxidation of 4-hydroxybenzoate in strain KZT1 is shown. Localization of the whole set of genes responsible for 2CBA degradation in the strain KZ2 chromosome is suggested.