Fig. 2From: Prevalence and molecular characterization of oqxAB in clinical Escherichia coli isolates from companion animals and humans in Henan Province, ChinaAgarose gel electrophoresis (a) and Southern hybridization (b) results for plasmid DNA preparations. Notes: Lanes M1, plasmid Marker V517; 1 to 5, E. coli Q1, M17, Q63, H050, and H029, respectively; M2, Marker 5000. Upper arrow in (b) indicates plasmid DNA; lower arrow in (b) indicates the location of chromosomal DNA and/or sheared plasmid DNABack to article page