Figure 1. Analysis of plasmid pIP1203. A) Agarose-gel electrophoresis of EcoRV-digested plasmid DNA from representative Yersinia pestis strain 6/69 (1) and from streptomycin-resistant strain 16/95 (2). B) Pulsed-field gel electrophoresis of pIP1203 DNA extracted from Escherichia coli K802N transconjugant and digested by EcoRV (1), EcoRI+EcoRV (2), and EcoRI (3). The arrow indicates the extra large-size DNA fragment in strain 16/95. The size of the molecular weight markers in kilobases is indicated at the left of the gels.
The opinions expressed by authors contributing to this journal do not necessarily reflect the opinions of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.