RT Journal Article SR Electronic(1) A1 Hedges, R. W. A1 Jacob, A. E. A1 Smith, J. T.YR 1974 T1 Properties of an R Factor from Bordetella bronchiseptica JF Microbiology, VO 84 IS 1 SP 199 OP 204 DO https://doi.org/10.1099/00221287-84-1-199 PB Microbiology Society, SN 1465-2080, AB SUMMARY: R906, a plasmid derived from a wild strain of Bordetella bronchiseptica, was transferred to Escherichia coli k12. In this host it is stably heritable, replicating as a DNA molecule with a molecular weight of 34.6 megadaltons. There are approximately three copies of the plasmid per chromosome. It is a member of compatibility group P. In E. coli, 906 confers resistance to ampicillin, streptomycin, sulphonamides and mercury salts. Resistance to ampicillin is determined by an oxacillin-hydrolysing β-lactamase whereas the resistance to streptomycin is not determined by either of the previously described streptomycin-inactivating enzymes but by some other mechanism., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-84-1-199