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Plasmid profiles of rhizobial strains isolated from bean seeds. Lanes: 1, CCGM6; 2, CCGM2; 3, CCGM3; 4, CCGM4; 5, CCGM5; 6, CCGM7; 7, CFN42; 8, CCGM1; 9, CIAT652. Plasmids were visualized using the Eckhardt technique. Asterisks indicate the positions of plasmids hybridizing with the nifH probe, denoting the symbiotic plasmid.
