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Conjugation efficiency of plasmids. Graph shows the number of transconjugants per donor of transfer from the indicated strains. Columns are means of three determinations; standard error of the means were <0.01 % and are too small to show on the plot. The antibiotic used to select transconjugants is shown next to the strain used: AMP is ampicillin, CTX is cefotaxime. The lower limit of detection was 10−8 transconjugants per donor cell.
