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J Bacteriol. 1983 July; 155(1): 311-316

Isolation and characterization of the recA gene of Rhizobium meliloti.

ABSTRACT

Interspecific complementation of an Escherichia coli recA mutant with plasmids containing a gene bank of Rhizobium meliloti DNA was used to identify a clone which contains the recA gene of R. meliloti. The R. meliloti recA protein can function in recombination and in response to DNA damage when expressed in an E. coli recA host, and hybridization studies have shown that DNA sequence homology exists between the recA gene of E. coli and that of R. meliloti. The isolated R. meliloti recA DNA was used to construct a recA R. meliloti, and this bacterium was not deficient in its ability to carry out symbiotic nitrogen fixation.

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