Figure 1. Electrophoretic separation of pDNA in 1% agarose gel, stained with ethidium bromide. 1, 2, 3, 4 — DNA samples Ob1, Ob2, Ob3, and Ob4, stated respectively. M — DNA molecular weight marker. To the left of the markers, 100 ng of each sample was applied, to the right, 500 ng.