M. Flores et al., 3 REPLICONS OF RHIZOBIUM SP. STRAIN NGR234 HARBOR SYMBIOTIC GENE-SEQUENCES, Journal of bacteriology (Print), 180(22), 1998, pp. 6052-6053
Rhizobium sp. strain NGR234 contains three replicons: the symbiotic pl
asmid or pNGR234a, a megaplasmid (pNGR234b), and the chromosome. Symbi
otic gene sequences not present in pNGR234a were analyzed by hybridiza
tion. DNA sequences homologous to the genes fixLJKNOPQGHIS were found
on the chromosome, while sequences homologous to nodPQ and exoBDFLK we
re found on pNGR234b.